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Showing 221 - 240 of 529 results

Effectiveness of Rumble Strips on Texas Highways: First Year Report

Carlson, Paul J. ;

Miles, Jeff D.

2003-09-01 | PDF

This report documents the first-year activities of a 30-month project in which the evaluation of various rumble strip applications will be tested. The focus has been on in-lane and centerline rumble strips. The pertinent literature was reviewed. State agencies with significant experience with centerline and in-lane rumble strips were contacted, and ...

11/24/2025

Title : Effectiveness of Rumble Strips on Texas Highways: First Year Report Creator(s) : Carlson, Paul J.;Miles, Jeff D.; Corporate Creator(s) : Texas A&M University. Texas Transportation Institute Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2003-09-01 Report Number : FHWA/TX-05/0-4472-1 URL : https://rosap.ntl.bts.gov/view/dot/87919 Carlson, Paul J. and Miles, Jeff D. (2003). Effectiveness of Rumble Strips on Texas Highways: First Year Report. Carlson, Paul J. and Miles, Jeff D. "Effectiveness of Rumble Strips on Texas Highways: First Year Report" (2003) Carlson, Paul J. and Miles, Jeff D. "Effectiveness of Rumble Strips on Texas Highways: First Year Report" , 2003 Export RIS Citation Information. TY - Tech Report AU - Carlson, Paul J. AU - Miles, Jeff D. A2 - Texas A&M University. Texas Transportation Institute A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - This report documents the first-year activities of a 30-month project in which the evaluation of various rumble strip applications will be tested. The focus has been on in-lane and centerline rumble strips. The pertinent literature was reviewed. State agencies with significant experience with centerline and in-lane rumble strips were contacted, and their policies reviewed. The researchers then developed initial application guidelines for these types of rumble strips. The application guidelines were then modified based on the project advisory committee comments. The in-lane rumble strips are currently being evaluated at stop-controlled intersections and horizontal curve locations throughout the state. The researchers plan to be completed with this part of the research by the end of 2003. There are currently no centerline rumble strips installed on Texas Department of Transportation highways. However, there are currently two districts planning to install centerline rumble strips as part of this research project. Two highway sections in the Brownwood District should have centerline rumble strips by the end of 2003. There has also been promising discussion to identify sites and have centerline rumble strips installed in various locations in the Austin District. The second-year activities of this project will focus on the completion of the in-lane rumble strip analysis. Guidelines for application of in-lane rumble strips will be developed based on the results. Also to be emphasized in the second year will be the installation and study of centerline rumble strips. It is expected that several sites will be installed within the second year, and surrogate safety measures will be studied in order to develop guidelines for the application of centerline rumble strips. Another focus of the second year of this project will be an ad-hoc safety study of profiled pavement markings. AN - dot:87919 ET - September 2002-August 2003 KW - Field studies KW - Guidelines KW - Highway curves KW - Intersections KW - Literature reviews KW - Rumble strips LA - English PB - Texas. Department of Transportation PY - 2003-09-01 SN - FHWA/TX-05/0-4472-1 TI - Effectiveness of Rumble Strips on Texas Highways: First Year Report M3 - Tech Report N1 - United States N1 - 0-4472 UR - https://rosap.ntl.bts.gov/view/dot/87919 ER -
Durability of Preformed Thermoplastic Pavement Markings for Horizontal Signing Applications

Chrysler, Susan T.

;

Schrock, Steven D.

2006-04-01 | PDF

The results of two-year durability tests of preformed thermoplastic pavement marking materials are reported. A survey of material manufacturers is also presented. Pavement marking materials in the form of transverse lines, arrowheads, and sections of the letter S were installed at test decks on three Texas roadways. Small square sections of colored ...

11/24/2025

Title : Durability of Preformed Thermoplastic Pavement Markings for Horizontal Signing Applications Creator(s) : Chrysler, Susan T.;Schrock, Steven D.;Gates, Timothy J.; Corporate Creator(s) : Texas A&M University. Texas Transportation Institute Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2006-04-01 Report Number : FHWA/TX-06/0-4471-3 URL : https://rosap.ntl.bts.gov/view/dot/87918 Chrysler, Susan T. et al. (2006). Durability of Preformed Thermoplastic Pavement Markings for Horizontal Signing Applications. Chrysler, Susan T. and Schrock, Steven D. and Gates, Timothy J. "Durability of Preformed Thermoplastic Pavement Markings for Horizontal Signing Applications" (2006) Chrysler, Susan T. et al. "Durability of Preformed Thermoplastic Pavement Markings for Horizontal Signing Applications" , 2006 Export RIS Citation Information. TY - Tech Report AU - Chrysler, Susan T. AU - Schrock, Steven D. AU - Gates, Timothy J. A2 - Texas A&M University. Texas Transportation Institute A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - The results of two-year durability tests of preformed thermoplastic pavement marking materials are reported. A survey of material manufacturers is also presented. Pavement marking materials in the form of transverse lines, arrowheads, and sections of the letter S were installed at test decks on three Texas roadways. Small square sections of colored pavement marking materials were also tested for some of the manufacturers. Manufacturers’ representatives performed the installations. Three types of pavement surface were tested: concrete, asphalt, and seal coat. Retroreflectivity and color measurements of the materials were made at the time of installation, after one year, and after two years. Thickness of the material was measured prior to installation and at the same time intervals using video microscopy of samples chiseled from the roadway. AN - dot:87918 ET - September 2002 – October 2005 KW - Asphalt pavements KW - Color KW - Concrete pavements KW - Durability tests KW - Industries KW - Microscopy KW - Retroreflectivity KW - Road marking materials KW - Road markings KW - Seal coats KW - Surface course (Pavements) LA - English PB - Texas. Department of Transportation PY - 2006-04-01 SN - FHWA/TX-06/0-4471-3 TI - Durability of Preformed Thermoplastic Pavement Markings for Horizontal Signing Applications M3 - Tech Report N1 - United States N1 - 0-4471 UR - https://rosap.ntl.bts.gov/view/dot/87918 ER -
Agent-Based Approach in Freight Systems: Towards A Door-To-Door (D2D) Freight Optimization

Aredah, Ahmed

;

Rakha, Hesham

2025-09-01 | PDF

This report presents CargoNetSim, an open-source, modular, high-fidelity optimization and simulation framework developed to model, analyze, and optimize multi-modal freight transportation movement. Integrating agent-based modeling (ABM) and system dynamics (SD), CargoNetSim bridges micro-level operational decisions and macro-scale network behaviors ...

11/24/2025

Title : Agent-Based Approach in Freight Systems: Towards A Door-To-Door (D2D) Freight Optimization Creator(s) : Aredah, Ahmed;Rakha, Hesham; Corporate Creator(s) : Virginia Tech;Virginia Polytechnic Institute and State University;Virginia Tech Transportation Institute; Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;Morgan State University.Safety and Mobility Advancements Regional Transportation and Economics Research Center. University Transportation Center (UTC);United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2025-09-01 Report Number : SM33 URL : https://rosap.ntl.bts.gov/view/dot/87917 Aredah, Ahmed and Rakha, Hesham (2025). Agent-Based Approach in Freight Systems: Towards A Door-To-Door (D2D) Freight Optimization. Aredah, Ahmed and Rakha, Hesham "Agent-Based Approach in Freight Systems: Towards A Door-To-Door (D2D) Freight Optimization" (2025) Aredah, Ahmed and Rakha, Hesham "Agent-Based Approach in Freight Systems: Towards A Door-To-Door (D2D) Freight Optimization" , 2025 Export RIS Citation Information. TY - Tech Report AU - Aredah, Ahmed AU - Rakha, Hesham A2 - Virginia Tech A2 - Virginia Polytechnic Institute and State University A2 - Virginia Tech Transportation Institute A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - Morgan State University.Safety and Mobility Advancements Regional Transportation and Economics Research Center. University Transportation Center (UTC) A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - This report presents CargoNetSim, an open-source, modular, high-fidelity optimization and simulation framework developed to model, analyze, and optimize multi-modal freight transportation movement. Integrating agent-based modeling (ABM) and system dynamics (SD), CargoNetSim bridges micro-level operational decisions and macro-scale network behaviors, enabling granular quantification of fuel/energy consumption and total transportation costs. The framework comprises four validated modules: NeTrainSim (rail), ShipNetSim (maritime), INTEGRATION (road/truck), and TerminalSim (terminal operations), all synchronized via a central integration hub leveraging RabbitMQ for real-time data exchange. A cost optimization module precedes simulation by filtering infeasible or sub-optimal routes based on time, monetary value, emissions, and energy metrics, reducing computational demand without compromising accuracy. The system is calibrated using authoritative U.S. freight datasets, cost factors, energy coefficients, and carbon taxation structures aligned with 2030 policy forecasts. A comprehensive case study is conducted for transcontinental container transport from Madrid, Spain, to multiple inland U.S. destinations (Kansas City, Chicago, Dallas, and Los Angeles). Simulated costs reveal significant deviations from pre-estimated costs—e.g., $8,671.42 vs. $4,455.04 for Kansas City—demonstrating the critical role of dynamic simulation in capturing real-world inefficiencies such as rail stoppages, terminal congestion, and customs delays. Sensitivity analysis further shows that rail becomes cost-effective when transporting over eight containers at a $24.08/hour MVOT, shifting to 14 containers at a $96.32/hour MVOT, indicating economies of scale as a decisive factor. The results underscore CargoNetSim’s utility as a decision-support tool for logistics managers and policymakers, enabling evaluation of trade-offs between operational efficiency and environmental effects. The system's ability to simulate emissions, dwell times, fuel use, and modal transfers across international corridors positions it as a pivotal platform for strategic freight planning and supply chain policy development. AN - dot:87917 ET - Final Report: September 2024 - August 2025 KW - Simulation KW - Freight traffic KW - Energy consumption KW - Greenhouse gases KW - Optimization KW - Supply chain management KW - Taxation KW - Cost effectiveness KW - Automation KW - ShipNetSim KW - Ship Large-Scale Simulation KW - Ship Longitudinal Motion LA - English PB - Morgan State University.Safety and Mobility Advancement Regional Transportation and Economics Research Center (SMARTER) University Transportation Center (UTC) PY - 2025-09-01 SN - SM33 TI - Agent-Based Approach in Freight Systems: Towards A Door-To-Door (D2D) Freight Optimization M3 - Tech Report N1 - United States N1 - 69A3552348303 UR - https://rosap.ntl.bts.gov/view/dot/87917 ER -
Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology [Research Brief]

Shi, Tianqin

;

Huang, Yanting

2025-11-01 | PDF

This study used a mixed-methods approach, combining qualitative and quantitative research techniques. First, the research team conducted semi structured interviews with six experts from EV and EV battery manufacturing companies in the United States and China. These interviews aimed to gather in-depth insights into the challenges faced in the curren ...

11/24/2025

Title : Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology [Research Brief] Creator(s) : Shi, Tianqin;Huang, Yanting; Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology;California. Department of Transportation; Published Date : 2025-11-01 URL : https://rosap.ntl.bts.gov/view/dot/87916 Shi, Tianqin and Huang, Yanting (2025). Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology [Research Brief]. Shi, Tianqin and Huang, Yanting "Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology [Research Brief]" (2025) Shi, Tianqin and Huang, Yanting "Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology [Research Brief]" , 2025 Export RIS Citation Information. TY - Brief AU - Shi, Tianqin AU - Huang, Yanting A2 - San Jose State University. College of Business. Mineta Transportation Institute A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology A3 - California. Department of Transportation AB - This study used a mixed-methods approach, combining qualitative and quantitative research techniques. First, the research team conducted semi structured interviews with six experts from EV and EV battery manufacturing companies in the United States and China. These interviews aimed to gather in-depth insights into the challenges faced in the current EV battery recycling processes, the impact of unregulated recyclers, and the potential benefits and barriers to implementing blockchain technology. Second, the team developed a model based on the Stackelberg game theory that was then used to analyze the strategic interactions among different stakeholders in the EV battery supply chain. The model includes a manufacturer, a retailer, a regulated recycler, and an unregulated recycler. It compares scenarios with and without blockchain adoption to assess its impact on recycling quantities, prices, and profits. The model uses mathematical equations to represent the decision-making processes of each stakeholder and to derive equilibrium (a state where supply and demand in a market are balanced) outcomes. AN - dot:87916 ET - Research Brief KW - Supply chain management KW - Information technology KW - Recycling KW - Electric vehicles KW - Blockchains KW - Strategic planning KW - Ecosystems KW - Cost effectiveness KW - Transportation KW - Quantitative analysis KW - Decision making LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2025-11-01 TI - Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology [Research Brief] M3 - Brief N1 - United States N1 - 2467 UR - https://rosap.ntl.bts.gov/view/dot/87916 ER -
Improving Concrete Performance Through the Use of Blast Furnace Slag

Bush, Thomas D Jr ;

Bruce, Russell W

2000-08-01 | PDF

A laboratory testing program was undertaken to evaluate the performance of ODOT Class AA and Class A concretes, specifically containing Oklahoma cements and aggregates, and utilizing partial replacement of portland cement (PC) with Grade 12 0 ground granulated blast furnace slag (BFS) and/or Class C fly ash (FA). Studies were conducted to examine p ...

11/24/2025

Title : Improving Concrete Performance Through the Use of Blast Furnace Slag Creator(s) : Bush, Thomas D Jr;Bruce, Russell W;Zaman, Musharraf M.;Hale, Micah W;Ling, Tieng A; Corporate Creator(s) : University of Oklahoma. School of Civil Engineering and Environmental Science Corporate Contributor(s) : Oklahoma. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2000-08-01 Report Number : FHWA-OK-00-01 URL : https://rosap.ntl.bts.gov/view/dot/87915 Bush, Thomas D Jr et al. (2000). Improving Concrete Performance Through the Use of Blast Furnace Slag. Bush, Thomas D Jr et al. "Improving Concrete Performance Through the Use of Blast Furnace Slag" (2000) Bush, Thomas D Jr et al. "Improving Concrete Performance Through the Use of Blast Furnace Slag" , 2000 Export RIS Citation Information. TY - Tech Report AU - Bush, Thomas D Jr AU - Bruce, Russell W AU - Zaman, Musharraf M. AU - Hale, Micah W AU - Ling, Tieng A A2 - University of Oklahoma. School of Civil Engineering and Environmental Science A3 - Oklahoma. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - A laboratory testing program was undertaken to evaluate the performance of ODOT Class AA and Class A concretes, specifically containing Oklahoma cements and aggregates, and utilizing partial replacement of portland cement (PC) with Grade 12 0 ground granulated blast furnace slag (BFS) and/or Class C fly ash (FA). Studies were conducted to examine performance aspects related to constituent materials (types and amounts used) as well as to construction/field issues. Blast furnace slag was used to replace portland cement on a 1: 1 basis by mass. Class C fly ash replaced portland cement at a 1.35:1 ratio, i.e., 1.35 lb. of fly ash replaced 1.0 lb. of portland cement. Replacement rates examined were: none (control); 25 percent BFS; 15 percent FA; and the combination of 25 percent BFS plus 15 percent FA. The primary variables examined were: 1) BFS and FA contents, 2) source of Type I cement, 3) mixing and curing temperature, and 4) concrete class (A and AA). Use of high range water reducers and treatment with silanes were also examined. As compared to control portland cement concrete, the use of Grade 12 0 BFS at the replacement rate tested had the following beneficial effects: 1) increased compressive, flexural, and tensile strengths (typically by 7 days for compressive strength), 2) substantially lower permeability (greatly reduced RCIP values and chloride ion absorption in the upper half inch depth), 3) reduced creep, and similar or slightly higher elastic modulus, and 4) consistent nature of performance. Blast furnace slag replacement (Grade 120) was also found to cause slight reductions in workability, and reduced effectiveness in entraining air when workability was decreased, or with low or elevated casting temperature. Setting times, freeze thaw resistance, shrinkage, and chloride ion absorption when treated by silane, were found similar for concrete with blast furnace slag when compared to concrete made with ordinary portland cement. AN - dot:87915 KW - Pozzolan KW - Blast furnaces KW - Slag KW - Fly ash KW - Durability LA - English PB - Oklahoma. Dept of Transportation PY - 2000-08-01 SN - FHWA-OK-00-01 TI - Improving Concrete Performance Through the Use of Blast Furnace Slag M3 - Tech Report N1 - United States N1 - 2136 UR - https://rosap.ntl.bts.gov/view/dot/87915 ER -
Safence Wire Rope Median Barrier

Roper, Steven D ;

Brewer, Wilson B.

2005-09-01 | PDF

The Safence Cable Barrier System is designed to minimize or eliminate crossover accidents on divided roadways. This system uses tour tensioned cables stacked vertically to prevent errant vehicles from crossing the median into oncoming traffic. This report documents the Oklahoma Department of Transportation's field test of this product. The barrier ...

11/24/2025

Title : Safence Wire Rope Median Barrier Creator(s) : Roper, Steven D;Brewer, Wilson B.; Corporate Creator(s) : Oklahoma. Dept. of Transportation. Planning & Research Division Published Date : 2005-09-01 Report Number : FHWA-OK 2130 URL : https://rosap.ntl.bts.gov/view/dot/87914 Roper, Steven D and Brewer, Wilson B. (2005). Safence Wire Rope Median Barrier. Roper, Steven D and Brewer, Wilson B. "Safence Wire Rope Median Barrier" (2005) Roper, Steven D and Brewer, Wilson B. "Safence Wire Rope Median Barrier" , 2005 Export RIS Citation Information. TY - Tech Report AU - Roper, Steven D AU - Brewer, Wilson B. A2 - Oklahoma. Dept. of Transportation. Planning & Research Division A4 - Sullivan, Dawn R AB - The Safence Cable Barrier System is designed to minimize or eliminate crossover accidents on divided roadways. This system uses tour tensioned cables stacked vertically to prevent errant vehicles from crossing the median into oncoming traffic. This report documents the Oklahoma Department of Transportation's field test of this product. The barrier was easily installed, and maintenance repairs require minimal time or equipment. The test section has been hit several times and has performed as designed every time. AN - dot:87914 KW - Rope, wire and cable KW - Rope KW - Median barriers KW - Construction LA - English PB - Oklahoma. Department of Transportation PY - 2005-09-01 SN - FHWA-OK 2130 TI - Safence Wire Rope Median Barrier M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/87914 ER -
Roadside Vegetation Management

Martin, Dennis L ;

Cargill, L M

1996-09-01 | PDF

The information contained within this report addresses: (1) Research -involving the use of experimental, newly labeled and traditionally available herbicides in combination with mowing for roadside vegetation management; (2) Maintenance implementation of research results into an operational phase of the Oklahoma Department of Transportation's (ODOT ...

11/24/2025

Title : Roadside Vegetation Management Creator(s) : Martin, Dennis L;Cargill, L M;Montgomery, Douglas P; Corporate Creator(s) : Oklahoma State University. Department of Horticulture and Landscape Architecture Corporate Contributor(s) : Oklahoma. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 1996-09-01 Report Number : FHWA/ODOT 96-05 URL : https://rosap.ntl.bts.gov/view/dot/87913 Martin, Dennis L et al. (1996). Roadside Vegetation Management. Martin, Dennis L and Cargill, L M and Montgomery, Douglas P "Roadside Vegetation Management" (1996) Martin, Dennis L et al. "Roadside Vegetation Management" , 1996 Export RIS Citation Information. TY - Tech Report AU - Martin, Dennis L AU - Cargill, L M AU - Montgomery, Douglas P A2 - Oklahoma State University. Department of Horticulture and Landscape Architecture A3 - Oklahoma. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The information contained within this report addresses: (1) Research -involving the use of experimental, newly labeled and traditionally available herbicides in combination with mowing for roadside vegetation management; (2) Maintenance implementation of research results into an operational phase of the Oklahoma Department of Transportation's (ODOT) maintenance program. as well as performing on-site visits, telephone and written consultation to ODOT personnel; and (3) Training -conducting pesticide applicator certification programs and providing continuing education programs for these certified applicators. AN - dot:87913 ET - December 1991 to September 1996 KW - Equipment KW - Field tests KW - Herbicides KW - Research LA - English PB - Oklahoma. Department of Transportation PY - 1996-09-01 SN - FHWA/ODOT 96-05 TI - Roadside Vegetation Management M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/87913 ER -
Modification and Evaluation of SENTRE Impact Attenuation Devices

Williams, Gary G

1990-03-01 | PDF

This report covers a study of SENTRE Impact Attenuation Devices, done to identify potential design or installation improvements, to make these improvements, and evaluate performance of the devices once the indicated modifications were made. During the study, a total of 21 SENTRE devices were installed on I-40 in Oklahoma City. Ten accidents involvi ...

11/24/2025

Title : Modification and Evaluation of SENTRE Impact Attenuation Devices Creator(s) : Williams, Gary G Corporate Creator(s) : Oklahoma. Department of Transportation. Office of Research and Implementation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1990-03-01 Report Number : (FHWA-90-02) 2719 URL : https://rosap.ntl.bts.gov/view/dot/87912 Williams, Gary G (1990). Modification and Evaluation of SENTRE Impact Attenuation Devices. Williams, Gary G "Modification and Evaluation of SENTRE Impact Attenuation Devices" (1990) Williams, Gary G "Modification and Evaluation of SENTRE Impact Attenuation Devices" , 1990 Export RIS Citation Information. TY - Tech Report AU - Williams, Gary G A2 - Oklahoma. Department of Transportation. Office of Research and Implementation A3 - United States. Department of Transportation. Federal Highway Administration AB - This report covers a study of SENTRE Impact Attenuation Devices, done to identify potential design or installation improvements, to make these improvements, and evaluate performance of the devices once the indicated modifications were made. During the study, a total of 21 SENTRE devices were installed on I-40 in Oklahoma City. Ten accidents involving SENTREs were documented. Analysis of these accidents led to modifications in amount of torque applied to anchor bolts, type of clips holding posts to base plates, and depth of topsoil covering the redirecting cable. The limited number of SENTRE installations, and the even more limited number of accidents precluded a statistical comparison of accidents involving SENTREs to those with exposed guardrail ends or other types of impact attenuation. In all of the accidents occurring after the modifications were made, the SENTRE units performed as the designers intended, suggesting that they were effective in reducing impact severity. AN - dot:87912 ET - Final Report 1985 to 1988 KW - Crash cushions KW - End bearing piles KW - Guardrails KW - Guardrail terminals KW - Impact attenuators KW - SENTRE LA - English PB - Oklahoma. Department of Transportation PY - 1990-03-01 SN - (FHWA-90-02) 2719 TI - Modification and Evaluation of SENTRE Impact Attenuation Devices M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/87912 ER -
Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology

Shi, Tianqin

;

Huang, Yanting

2025-11-01 | PDF

The surge in demand for electric vehicles (EV) and EV batteries, coupled with supply chain vulnerabilities and price instability, has driven the need for efficient and sustainable EV battery recycling processes. This report investigates the potential of blockchain technology to address the challenges in the EV battery reverse supply chain (moving g ...

11/24/2025

Title : Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology Creator(s) : Shi, Tianqin;Huang, Yanting; Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute Corporate Contributor(s) : California State University Office of the Chancellor;California Department of Transportation;United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2025-11-01 Report Number : 25-29;CA-MTI-2467; DOI : https://doi.org/10.31979/mti.2025.2467 Shi, Tianqin and Huang, Yanting (2025). Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology. https://doi.org/10.31979/mti.2025.2467 Shi, Tianqin and Huang, Yanting "Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology" (2025), https://doi.org/10.31979/mti.2025.2467 Shi, Tianqin and Huang, Yanting "Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology" , 2025, https://doi.org/10.31979/mti.2025.2467 Export RIS Citation Information. TY - Tech Report AU - Shi, Tianqin AU - Huang, Yanting A2 - San Jose State University. College of Business. Mineta Transportation Institute A3 - California State University Office of the Chancellor A3 - California Department of Transportation A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - The surge in demand for electric vehicles (EV) and EV batteries, coupled with supply chain vulnerabilities and price instability, has driven the need for efficient and sustainable EV battery recycling processes. This report investigates the potential of blockchain technology to address the challenges in the EV battery reverse supply chain (moving goods from the end customer back towards the manufacturer), focusing on enhancing transparency and coordination, as well as mitigating the impact of unregulated recycling. Key stakeholders in this analysis include manufacturers, recyclers, and regulatory bodies. To achieve these objectives, the study employs a mixed-methods approach. It includes semi-structured interviews with industry experts from EV and battery manufacturing companies to gather qualitative insights into the current challenges and the potential of blockchain technology. Furthermore, the study used a model based on the Stackelberg game theory to analyze the impact of blockchain adoption on the behavior and profitability of supply chain members, specifically focusing on the interaction between regulated and unregulated recyclers. The findings show that blockchain technology can offer significant benefits to the EV battery reverse supply chain. Specifically, blockchain adoption can increase the total recycling quantity, provided that the implementation costs are relatively low. Additionally, blockchain can help empower regulated recyclers to achieve higher buyback prices and recycling quantities compared to unregulated recyclers, enhancing the competitiveness of responsible recycling practices. However, the adoption of blockchain technology depends on its cost-effectiveness and the intensity of competition within the recycling sector. These results highlight the importance of strategic blockchain implementation and regulatory support to foster a sustainable and efficient EV battery recycling ecosystem, which supports a sustainable transportation industry. AN - dot:87911 DO - https://doi.org/10.31979/mti.2025.2467 KW - Supply chain management KW - Information technology KW - Recycling KW - Electric vehicles KW - Blockchains KW - Strategic planning KW - Ecosystems KW - Cost effectiveness KW - Transportation LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2025-11-01 SN - 25-29 TI - Information Strategies in the Electric Vehicles Battery Reverse Supply Chain with Blockchain Technology M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/87911 ER -
Evaluation of a Pyrament Bridge Deck Overlay

Gordon, Kimberly L.

1996-11-01 | PDF

The Oklahoma Department of Transportation (ODOT) has been using high density Portland cement (HDPC) overlays for more than twenty years to minimize spalls and delamination in concrete. Since HDPC overlays were introduced, additives were incorporated into these mixtures to increase concrete strength and durability as well as decrease the time needed ...

11/24/2025

Title : Evaluation of a Pyrament Bridge Deck Overlay Creator(s) : Gordon, Kimberly L. Corporate Creator(s) : Oklahoma. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1996-11-01 Report Number : FHWA/OK 96(12) URL : https://rosap.ntl.bts.gov/view/dot/87910 Gordon, Kimberly L. (1996). Evaluation of a Pyrament Bridge Deck Overlay. Gordon, Kimberly L. "Evaluation of a Pyrament Bridge Deck Overlay" (1996) Gordon, Kimberly L. "Evaluation of a Pyrament Bridge Deck Overlay" , 1996 Export RIS Citation Information. TY - Tech Report AU - Gordon, Kimberly L. A2 - Oklahoma. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Oklahoma Department of Transportation (ODOT) has been using high density Portland cement (HDPC) overlays for more than twenty years to minimize spalls and delamination in concrete. Since HDPC overlays were introduced, additives were incorporated into these mixtures to increase concrete strength and durability as well as decrease the time needed for curing. Pyrament, marketed and manufactured by Lonestar Industries, is a concrete comprised of 65% Portland Cement, 30% fly ash, and 5% trademark additive. In 1990, Pyrament concrete was used on a bridge reconstruction project. The Research, Development, and Technology Transfer (RD&T) of ODOT monitored the construction process and documented their findings. In order to assess the long-term performance of Pyrament, RD&T has been evaluating this bridge deck since the completion of construction at regular intervals. Four tests were used to evaluate the condition of the two-inch Pyrament overlay: visual, delamination, chloride ion content and half-cell corrosion surveys. While there was widespread cracking, the chloride and half-cell surveys did not yield unusually high chloride contamination or corrosion levels. Pyrament is no longer available for commercial use. This will be the final report on the long-term performance of the Pyrament overlay system applied in Oklahoma County. AN - dot:87910 ET - Final Report: April 1990 - June 1994 KW - Concrete overlays KW - Spalling KW - Delamination KW - Corrosion KW - Cracking KW - Evaluation KW - Portland cement KW - Bridge decks KW - Bridge construction KW - Testing KW - Additives KW - Mixtures LA - English PB - Oklahoma. Department of Transportation PY - 1996-11-01 SN - FHWA/OK 96(12) TI - Evaluation of a Pyrament Bridge Deck Overlay M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/87910 ER -
Development of Design Criteria for CCTV Camera Poles

Abolmaali, Ali ;

Ardekani, Siamak A.

2005-09-01 | PDF

Design equations for steel and Fiber Reinforced Polymer (FRP) Closed Circuit Television (CCTV) camera poles are developed using full scale experimental testing and detailed finite element analyses. This study presents the development of three-parameter load-deflection models for steel and FRP poles commonly used to support CCTV cameras. An experime ...

11/24/2025

Title : Development of Design Criteria for CCTV Camera Poles Creator(s) : Abolmaali, Ali;Ardekani, Siamak A.;Jung, Jiwon; Corporate Creator(s) : University of Texas at Arlington. Department of Civil and Environmental Engineering Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2005-09-01 Report Number : FHWA/TX-06/0-4470-2 URL : https://rosap.ntl.bts.gov/view/dot/87909 Abolmaali, Ali et al. (2005). Development of Design Criteria for CCTV Camera Poles. Abolmaali, Ali and Ardekani, Siamak A. and Jung, Jiwon "Development of Design Criteria for CCTV Camera Poles" (2005) Abolmaali, Ali et al. "Development of Design Criteria for CCTV Camera Poles" , 2005 Export RIS Citation Information. TY - Tech Report AU - Abolmaali, Ali AU - Ardekani, Siamak A. AU - Jung, Jiwon A2 - University of Texas at Arlington. Department of Civil and Environmental Engineering A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - Design equations for steel and Fiber Reinforced Polymer (FRP) Closed Circuit Television (CCTV) camera poles are developed using full scale experimental testing and detailed finite element analyses. This study presents the development of three-parameter load-deflection models for steel and FRP poles commonly used to support CCTV cameras. An experimental investigation is carried out to obtain static load-deflection characteristics of tapered octagonal steel cross section and circular FRP cross section poles. Numerical results generated from a three-dimensional isoparametric finite element model (FEM) considering coupled nonlinear algorithms for material, geometric, contact, and pre-tensioning effects are compared with those obtained experimentally. Eight-node elasto-plastic solid element is employed to model the pole, endplate, bolts, concrete base, and laboratory reaction floor. The laboratory reaction floor is modeled with a thick plate having infinite stiffness. The pretensioning effect is modeled by using a pretension element. A surface-to-surface contact algorithm is used to simulate the interaction between contact surfaces of bolt head, shank, and nut with endplate and bolt holes. Newton-Raphson scheme is used in the nonlinear regime, and convergence is checked using Hilbert L-2 norm and energy-based convergence. A parametric study is conducted to verify the validity of the FEM and the analysis algorithms by observing the effects of the geometric and force-related variables, one at a time, on the load-deflection characteristics of the poles. AN - dot:87909 ET - February 2003 -August 2005 KW - Cameras KW - Closed circuit television KW - Deflection KW - Design KW - Fiber reinforced plastics KW - Finite element method KW - Pretensioning KW - Steel KW - Poles (Supports) KW - Testing LA - English PB - Texas. Department of Transportation PY - 2005-09-01 SN - FHWA/TX-06/0-4470-2 TI - Development of Design Criteria for CCTV Camera Poles M3 - Tech Report N1 - United States N1 - 0-4470 UR - https://rosap.ntl.bts.gov/view/dot/87909 ER -
Preliminary Fatigue Analysis of a Common TxDOT Hot Mix Asphalt Concrete Mixture

Walubita, Lubinda F. ;

Martin, Amy Epps

2005-06-01 | PDF

Over the past decade, the Texas Department of Transportation (TxDOT) focused research efforts on improving mixture design to preclude rutting in the early life of the pavement, which also offered increased resistance to moisture damage, but fatigue cracking may surface in the long term particularly if the binder stiffens excessively due to aging. T ...

11/24/2025

Title : Preliminary Fatigue Analysis of a Common TxDOT Hot Mix Asphalt Concrete Mixture Creator(s) : Walubita, Lubinda F.;Martin, Amy Epps;Jung, Sung Hoon;Glover, Charles J.;Chowdhury, Arif;Park, Eun Sug;Lytton, Robert L.; Corporate Creator(s) : Texas A&M University. Texas Transportation Institute Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2005-06-01 Report Number : FHWA/TX-05/0-4468-1 URL : https://rosap.ntl.bts.gov/view/dot/87908 Walubita, Lubinda F. et al. (2005). Preliminary Fatigue Analysis of a Common TxDOT Hot Mix Asphalt Concrete Mixture. Walubita, Lubinda F. et al. "Preliminary Fatigue Analysis of a Common TxDOT Hot Mix Asphalt Concrete Mixture" (2005) Walubita, Lubinda F. et al. "Preliminary Fatigue Analysis of a Common TxDOT Hot Mix Asphalt Concrete Mixture" , 2005 Export RIS Citation Information. TY - Tech Report AU - Walubita, Lubinda F. AU - Martin, Amy Epps AU - Jung, Sung Hoon AU - Glover, Charles J. AU - Chowdhury, Arif AU - Park, Eun Sug AU - Lytton, Robert L. A2 - Texas A&M University. Texas Transportation Institute A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - Over the past decade, the Texas Department of Transportation (TxDOT) focused research efforts on improving mixture design to preclude rutting in the early life of the pavement, which also offered increased resistance to moisture damage, but fatigue cracking may surface in the long term particularly if the binder stiffens excessively due to aging. The primary goal of this project is to evaluate and recommend a fatigue analysis system for TxDOT designs to ensure adequate mixture fatigue performance in a particular pavement structure under specific environmental and loading conditions. A secondary goal of comparing fatigue resistance of commonly used TxDOT mixtures including investigating the effects of aging will also be realized. Two fatigue analysis approaches, the mechanistic empirical (ME) and the calibrated mechanistic with surface energy (CMSE) measurements, based on one common TxDOT mixture including the effects of aging are presented in this interim report. Results showed that both the ME and CMSE approaches were comparable in terms of predicting mixture fatigue resistance. The results also showed that aging reduces the mixture’s resistance to fracture damage and its ability to heal. A preliminary comparison of the ME and CMSE approaches showed that although the ME analysis procedure is simple and straightforward, there is a relatively high variability in both the mixture air voids (AV) and the final fatigue results. The input data for the CMSE approach are very comprehensive and require numerous auxiliary tests that are necessary to account for all the hot mix asphalt concrete (HMAC) mixture properties that affect fatigue performance. However, research is still ongoing to further:(1) investigate the effects of binder aging on the HMAC mixture fatigue properties, (2) review other fatigue analysis approaches including the proposed National Cooperative Highway Research Program (NCHRP) 1-37A Pavement Design Guide, and (3) investigate the applicability and validity of the CMSE fatigue analysis approach, and finally recommend an appropriate fatigue analysis system to TxDOT. AN - dot:87908 ET - September 2002-April 2004 KW - Aging (Materials) KW - Asphalt mixtures KW - Binders KW - Classical field theory KW - Costs KW - Cracking KW - Hot mix asphalt KW - Laboratory tests KW - Fatigue (Mechanics) LA - English PB - Texas. Department of Transportation PY - 2005-06-01 SN - FHWA/TX-05/0-4468-1 TI - Preliminary Fatigue Analysis of a Common TxDOT Hot Mix Asphalt Concrete Mixture M3 - Tech Report N1 - United States N1 - 0-4468 UR - https://rosap.ntl.bts.gov/view/dot/87908 ER -
Comparison of Fatigue Analysis Approaches for Two Hot Mix Asphalt Concrete (HMAC) Mixtures

Walubita, Lubinda F. ;

Martin, Amy Epps

2005-08-01 | PDF

Over the past decade, the Texas Department of Transportation (TxDOT) focused research efforts on improving mixture design to preclude rutting in the early life of the pavement. However, these rut resistant stiff mixtures may be susceptible to long-term fatigue cracking in the pavement structure as the binder stiffens due to oxidative aging. To addr ...

11/24/2025

Title : Comparison of Fatigue Analysis Approaches for Two Hot Mix Asphalt Concrete (HMAC) Mixtures Creator(s) : Walubita, Lubinda F.;Martin, Amy Epps;Jung, Sung Hoon;Glover, Charles J.;Park, Eun Sug;Chowdhury, Arif;Lytton, Robert L.; Corporate Creator(s) : Texas A&M University. Texas Transportation Institute Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2005-08-01 Report Number : FHWA/TX-05/0-4468-2 URL : https://rosap.ntl.bts.gov/view/dot/87907 Walubita, Lubinda F. et al. (2005). Comparison of Fatigue Analysis Approaches for Two Hot Mix Asphalt Concrete (HMAC) Mixtures. Walubita, Lubinda F. et al. "Comparison of Fatigue Analysis Approaches for Two Hot Mix Asphalt Concrete (HMAC) Mixtures" (2005) Walubita, Lubinda F. et al. "Comparison of Fatigue Analysis Approaches for Two Hot Mix Asphalt Concrete (HMAC) Mixtures" , 2005 Export RIS Citation Information. TY - Tech Report AU - Walubita, Lubinda F. AU - Martin, Amy Epps AU - Jung, Sung Hoon AU - Glover, Charles J. AU - Park, Eun Sug AU - Chowdhury, Arif AU - Lytton, Robert L. A2 - Texas A&M University. Texas Transportation Institute A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - Over the past decade, the Texas Department of Transportation (TxDOT) focused research efforts on improving mixture design to preclude rutting in the early life of the pavement. However, these rut resistant stiff mixtures may be susceptible to long-term fatigue cracking in the pavement structure as the binder stiffens due to oxidative aging. To address this concern, TxDOT initiated a research study with the primary goal of evaluating and recommending a hot mix asphalt concrete (HMAC) mixture fatigue design and analysis system to ensure adequate mixture fatigue performance in a particular pavement structure under specific environmental and traffic loading conditions. A secondary goal of the research was to compare the fatigue resistance of commonly used TxDOT HMAC mixtures including investigating the effects of binder aging on fatigue performance. Four fatigue analysis approaches, the mechanistic empirical (ME), the calibrated mechanistic with (CMSE) and without (CM) surface energy measurements, and the proposed National Cooperative Highway Research Program (NCHRP) 1-37A Pavement Design Guide were investigated in this project to evaluate the fatigue resistance of two common TxDOT mixtures (Rut Resistant and Basic Type C) including the effects of aging. Based on the value engineering assessment including test results, statistical analysis, costs, and relative comparison of each analysis procedure, the continuum micromechanics based CMSE fatigue analysis approach was recommended for predicting HMAC mixture fatigue life (N sub f). While binder oxidative aging reduced the HMAC mixture resistance to fracture and its ability to heal, the Rut Resistant mixture exhibited better fatigue resistance in terms of N sub f magnitude compared to the Basic Type C mixture possibly due to an increased polymer modified binder content. Test results also indicated that both binders and mixtures stiffen with oxidative aging, and that mixture aging correlated quantitatively with binder aging. From the binder shear properties and binder-mixture relationships, aging shift factors were developed and produced promising results. Nonetheless, more CMSE laboratory HMAC mixture fatigue characterization and field validation is recommended. AN - dot:87907 KW - Aging (Materials) KW - Asphalt mixtures KW - Binders KW - Classical field theory KW - Costs KW - Cracking KW - Hot mix asphalt KW - Laboratory tests KW - Fatigue (Mechanics) LA - English PB - Texas. Department of Transportation PY - 2005-08-01 SN - FHWA/TX-05/0-4468-2 TI - Comparison of Fatigue Analysis Approaches for Two Hot Mix Asphalt Concrete (HMAC) Mixtures M3 - Tech Report N1 - United States N1 - 0-4468 UR - https://rosap.ntl.bts.gov/view/dot/87907 ER -
Pilot Implementation of the Overlay Tester and Double-Blade Saw

Hu, Xiaodi ;

Zhou, Fujie

2008-02-01 | PDF

Past experience and recent field performance data has shown that several of Texas Department of Transportation’s (TxDOT’s) widely used asphalt mixtures are rut resistant but increasingly prone to cracking. Under Research Project 0-4467 the Overlay Tester (OT) was successfully demonstrated as a simple performance-related test to identify the crack r ...

11/24/2025

Title : Pilot Implementation of the Overlay Tester and Double-Blade Saw Creator(s) : Hu, Xiaodi;Zhou, Fujie;Scullion, Tom; Corporate Creator(s) : Texas A&M University. Texas Transportation Institute Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2008-02-01 Report Number : FHWA/TX-08/5-4467-01-1 URL : https://rosap.ntl.bts.gov/view/dot/87906 Hu, Xiaodi et al. (2008). Pilot Implementation of the Overlay Tester and Double-Blade Saw. Hu, Xiaodi and Zhou, Fujie and Scullion, Tom "Pilot Implementation of the Overlay Tester and Double-Blade Saw" (2008) Hu, Xiaodi et al. "Pilot Implementation of the Overlay Tester and Double-Blade Saw" , 2008 Export RIS Citation Information. TY - Tech Report AU - Hu, Xiaodi AU - Zhou, Fujie AU - Scullion, Tom A2 - Texas A&M University. Texas Transportation Institute A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - Past experience and recent field performance data has shown that several of Texas Department of Transportation’s (TxDOT’s) widely used asphalt mixtures are rut resistant but increasingly prone to cracking. Under Research Project 0-4467 the Overlay Tester (OT) was successfully demonstrated as a simple performance-related test to identify the crack resistance of asphalt mixtures. This implementation project focused on developing specifications for the OT, purchasing three units, and conducting shakedown tests on the new units. Within lab testing at the Texas Transportation Institute produced very consistent results. However, variability problems were encountered in the initial Round-Robin tests between labs. An investigation was conducted to identify the source of the differences. Several factors were identified, and these are described in this report. Recommendations were made to modify the test protocol, and it is highly recommended that a second Round-Robin test be conducted to evaluate the repeatability and reproducibility of the overlay tester. Additionally, specifications for double-bladed saws were developed and three saws were purchased and delivered to Districts labs. The samples cut with these saws meet the required operational tolerances. However, it was recommended that calibration may be required on mixtures made with extremely hard rock, such as river gravels. The results obtained with both the new overlay testers and double-bladed saws are presented in this report. The specifications for each device are given in the Appendices. AN - dot:87906 ET - September 2006-August 2007 KW - Asphalt mixtures KW - Calibration KW - Field tests KW - Overlays (Pavements) KW - Pavement cracking KW - Shakedown tests KW - Surface course (Pavements) KW - Testing equipment LA - English PB - Texas. Department of Transportation PY - 2008-02-01 SN - FHWA/TX-08/5-4467-01-1 TI - Pilot Implementation of the Overlay Tester and Double-Blade Saw M3 - Tech Report N1 - United States N1 - 5-4467-01 UR - https://rosap.ntl.bts.gov/view/dot/87906 ER -
Silane Penetrating Waterproof Sealers

Gordon, Kimberly L.

1996-11-01 | PDF

The Oklahoma Department of Transportation has been applying silane penetrating water sealers since the late 1970's to prevent the intrusion of chloride contaminated water in bridge decks. This contaminated moisture causes severe corrosion in reinforcing steel and costly damage to the bridge deck. To determine how silanes perform in the field, Resea ...

11/24/2025

Title : Silane Penetrating Waterproof Sealers Creator(s) : Gordon, Kimberly L. Corporate Creator(s) : Oklahoma. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1996-11-01 Report Number : FHWA/ OK 96(09) URL : https://rosap.ntl.bts.gov/view/dot/87905 Gordon, Kimberly L. (1996). Silane Penetrating Waterproof Sealers. Gordon, Kimberly L. "Silane Penetrating Waterproof Sealers" (1996) Gordon, Kimberly L. "Silane Penetrating Waterproof Sealers" , 1996 Export RIS Citation Information. TY - Tech Report AU - Gordon, Kimberly L. A2 - Oklahoma. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Oklahoma Department of Transportation has been applying silane penetrating water sealers since the late 1970's to prevent the intrusion of chloride contaminated water in bridge decks. This contaminated moisture causes severe corrosion in reinforcing steel and costly damage to the bridge deck. To determine how silanes perform in the field, Research, Development and Technology Transfer established an evaluation plan. The primary objectives of this study were to monitor the chloride ion content and corrosion activity in the top mat of reinforcing steel and to evaluate the performance of Portland cement penetrating sealers over five years. Ten bridges treated with silanes were selected for this study along with one untreated bridge. This report discusses the findings as they pertain to these objectives. Tests were performed to assess the physical characteristics of the bridge deck over time and ascertain the presence of silanes years after application. In order to obtain a true picture of the performance of water penetrating silanes over time, it is necessary to have initial data. There was little initial information recorded at the onset of this evaluation. In short, absence of initial conditions makes it difficult to evaluate the long term performance of silane penetrating sealers. Since the time of this evaluation, modifications have been made to the specifications and conditions by which silanes may be applied to bridge decks. Continued monitoring of these bridges decks without critical initial information will not yield more reliable results or information that will be applicable to bridges currently treated with silanes. AN - dot:87905 ET - Final Report: April 1989 - April 1993 KW - Silane KW - Absorption KW - Chlorides KW - Sealing compounds KW - Waterproofing materials KW - Bridge decks KW - Corrosion KW - Moisture content KW - Portland cement KW - Monitoring KW - Data analysis KW - half cell KW - penetration LA - English PB - Oklahoma. Department of Transportation PY - 1996-11-01 SN - FHWA/ OK 96(09) TI - Silane Penetrating Waterproof Sealers M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/87905 ER -
Upgraded Overlay Tester and Its Application to Characterize Reflection Cracking Resistance of Asphalt Mixtures

Zhou, Fujie

;

Scullion, Tom

2003-12-01 | PDF

Reflection cracking is a major concern when placing an overlay on a cracked pavement. The opening and closing of joints and/or cracks induced by daily temperature cycles is a major contributor to reflection cracking. This mechanism is currently being simulated in the laboratory at the Texas Transportation Institute (TTI) using a specially modified ...

11/24/2025

Title : Upgraded Overlay Tester and Its Application to Characterize Reflection Cracking Resistance of Asphalt Mixtures Creator(s) : Zhou, Fujie;Scullion, Tom; Corporate Creator(s) : Texas A&M University. Texas Transportation Institute Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2003-12-01 Report Number : FHWA/TX-04/0-4467-1 URL : https://rosap.ntl.bts.gov/view/dot/87904 Zhou, Fujie and Scullion, Tom (2003). Upgraded Overlay Tester and Its Application to Characterize Reflection Cracking Resistance of Asphalt Mixtures. Zhou, Fujie and Scullion, Tom "Upgraded Overlay Tester and Its Application to Characterize Reflection Cracking Resistance of Asphalt Mixtures" (2003) Zhou, Fujie and Scullion, Tom "Upgraded Overlay Tester and Its Application to Characterize Reflection Cracking Resistance of Asphalt Mixtures" , 2003 Export RIS Citation Information. TY - Tech Report AU - Zhou, Fujie AU - Scullion, Tom A2 - Texas A&M University. Texas Transportation Institute A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - Reflection cracking is a major concern when placing an overlay on a cracked pavement. The opening and closing of joints and/or cracks induced by daily temperature cycles is a major contributor to reflection cracking. This mechanism is currently being simulated in the laboratory at the Texas Transportation Institute (TTI) using a specially modified overlay-tester device. To evaluate the overlay tester concept laboratory results are presented on cores from four Texas projects, three of which performed very poorly and one of which performed excellently. The asphalt mixture on US 175 in Dallas was placed on a cracked stabilized base and did not have a single reflection crack after 10 years in service, whereas the mixtures on two projects were badly cracked after only a few months. The results clearly show that the upgraded TTI overlay tester can effectively differentiate between the reflection cracking resistance of different asphalt mixtures. It is also found that the reflection cracking resistance of asphalt mixture has a good correlation with the asphalt binder properties. In this report the upgraded TTI overlay tester is also used to quantify the benefits of modified asphalt binders. This benefit is demonstrated with a single mix where specimens were prepared with a variety of asphalt binders. The mix prepared with PG 64-22 plus 3% SBR latex demonstrated superior reflection cracking resistance while still maintaining adequate rutting resistance. It is proposed that the overlay tester is a practical device which can be incorporated into mixture design systems, to complement the current systems, which often focus solely on minimizing rutting potential. In many instances it is necessary to optimize both crack resistance and rutting potential to obtain adequate long-term pavement performance. AN - dot:87904 KW - Asphalt mixtures KW - Bituminous binders KW - Samples KW - Latex asphalt KW - Overlays (Pavements) KW - Pavement performance KW - Reflection cracking KW - Simulation KW - Styrene butadiene rubber KW - Testing equipment LA - English PB - Texas. Department of Transportation PY - 2003-12-01 SN - FHWA/TX-04/0-4467-1 TI - Upgraded Overlay Tester and Its Application to Characterize Reflection Cracking Resistance of Asphalt Mixtures M3 - Tech Report N1 - United States N1 - 0-4467 UR - https://rosap.ntl.bts.gov/view/dot/87904 ER -
Using Profile Measurements to Locate and Measure Grind and Fill Areas to Improve Pavement Ride

Walker, Roger S. ;

Fernando, Emmanuel G.

2008-06-01 | PDF

Good ride quality, proper cross slope, and accurate material estimates are important for an overlay project. Currently there is not a method in Texas to accurately relate the condition of an existing roadway with the potential benefits of different overlay and milling strategies during the design phase or provide the appropriate information to the ...

11/24/2025

Title : Using Profile Measurements to Locate and Measure Grind and Fill Areas to Improve Pavement Ride Creator(s) : Walker, Roger S.;Fernando, Emmanuel G.;Becker, Eric;Qader, Jareer Abdel;Harrison, Gerry; Corporate Creator(s) : University of Texas at Arlington Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2008-06-01 Report Number : FHWA/TX-08/0-4463-1 URL : https://rosap.ntl.bts.gov/view/dot/87903 Walker, Roger S. et al. (2008). Using Profile Measurements to Locate and Measure Grind and Fill Areas to Improve Pavement Ride. Walker, Roger S. et al. "Using Profile Measurements to Locate and Measure Grind and Fill Areas to Improve Pavement Ride" (2008) Walker, Roger S. et al. "Using Profile Measurements to Locate and Measure Grind and Fill Areas to Improve Pavement Ride" , 2008 Export RIS Citation Information. TY - Tech Report AU - Walker, Roger S. AU - Fernando, Emmanuel G. AU - Becker, Eric AU - Qader, Jareer Abdel AU - Harrison, Gerry A2 - University of Texas at Arlington A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - Good ride quality, proper cross slope, and accurate material estimates are important for an overlay project. Currently there is not a method in Texas to accurately relate the condition of an existing roadway with the potential benefits of different overlay and milling strategies during the design phase or provide the appropriate information to the contractor. Many Districts have requested the use of the Texas Department of Transportation inertial profilers to locate and measure potential grind and fill areas on paving projects prior to overlays. The Districts want to use a high-speed accurate instrument to survey the existing roadway without disrupting traffic. This research develops a method which can integrate data from a scanning laser or multi-path profiles with a gyroscope and inertial profiler for viewing three-dimensional pavement surfaces for overlay and milling strategies. AN - dot:87903 ET - June 2004 – August 2006 KW - Grinding KW - Gyroscopes KW - Milling KW - Overlays (Pavements) KW - Pavement maintenance KW - Surface preparation LA - English PB - Texas. Department of Transportation PY - 2008-06-01 SN - FHWA/TX-08/0-4463-1 TI - Using Profile Measurements to Locate and Measure Grind and Fill Areas to Improve Pavement Ride M3 - Tech Report N1 - United States N1 - 0-4463 UR - https://rosap.ntl.bts.gov/view/dot/87903 ER -
NHTSA News: May-June 1985 [Vol. 11, Nos. 5 & 6]

United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs

1985-05-01 | NHTSA News | PDF

NHTSA News was a semi-monthly employee newsletter prepared by the National Highway Traffic Safety Administration's Executive Secretariat (1975 to circa 1983) and the Office of Public and Consumer Affairs (1984-). The newsletter provided information about projects and current events, employee's accomplishments, personnel changes, and safety tips.

11/24/2025

Title : NHTSA News: May-June 1985 [Vol. 11, Nos. 5 & 6] Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs Published Date : 1985-05-01 Series : NHTSA News DOI : https://doi.org/10.21949/fc59-bb23 United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs (1985). NHTSA News: May-June 1985 [Vol. 11, Nos. 5 & 6]. https://doi.org/10.21949/fc59-bb23 United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs "NHTSA News: May-June 1985 [Vol. 11, Nos. 5 & 6]" (1985), https://doi.org/10.21949/fc59-bb23 United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs "NHTSA News: May-June 1985 [Vol. 11, Nos. 5 & 6]" , 1985, https://doi.org/10.21949/fc59-bb23 Export RIS Citation Information. TY - Newsletters A2 - United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs AB - NHTSA News was a semi-monthly employee newsletter prepared by the National Highway Traffic Safety Administration's Executive Secretariat (1975 to circa 1983) and the Office of Public and Consumer Affairs (1984-). The newsletter provided information about projects and current events, employee's accomplishments, personnel changes, and safety tips. AN - dot:87902 DO - https://doi.org/10.21949/fc59-bb23 ET - Vol. 11, Nos. 5 & 6 KW - News KW - Highway safety KW - Traffic safety KW - Employee communications KW - Government employees KW - Management and organization LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs PY - 1985-05-01 T2 - NHTSA News TI - NHTSA News: May-June 1985 [Vol. 11, Nos. 5 & 6] M3 - Newsletters N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/87902 ER -
NHTSA News: November 1984 [Vol. 10, No. 11]

United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs

1984-11-01 | NHTSA News | PDF

NHTSA News was a semi-monthly employee newsletter prepared by the National Highway Traffic Safety Administration's Executive Secretariat (1975 to circa 1983) and the Office of Public and Consumer Affairs (1984-). The newsletter provided information about projects and current events, employee's accomplishments, personnel changes, and safety tips.

11/24/2025

Title : NHTSA News: November 1984 [Vol. 10, No. 11] Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs Published Date : 1984-11-01 Series : NHTSA News DOI : https://doi.org/10.21949/kpn9-c280 United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs (1984). NHTSA News: November 1984 [Vol. 10, No. 11]. https://doi.org/10.21949/kpn9-c280 United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs "NHTSA News: November 1984 [Vol. 10, No. 11]" (1984), https://doi.org/10.21949/kpn9-c280 United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs "NHTSA News: November 1984 [Vol. 10, No. 11]" , 1984, https://doi.org/10.21949/kpn9-c280 Export RIS Citation Information. TY - Newsletters A2 - United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs AB - NHTSA News was a semi-monthly employee newsletter prepared by the National Highway Traffic Safety Administration's Executive Secretariat (1975 to circa 1983) and the Office of Public and Consumer Affairs (1984-). The newsletter provided information about projects and current events, employee's accomplishments, personnel changes, and safety tips. AN - dot:87901 DO - https://doi.org/10.21949/kpn9-c280 ET - Vol. 10, No. 11 KW - News KW - Highway safety KW - Traffic safety KW - Employee communications KW - Government employees KW - Management and organization LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs PY - 1984-11-01 T2 - NHTSA News TI - NHTSA News: November 1984 [Vol. 10, No. 11] M3 - Newsletters N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/87901 ER -
NHTSA News: October 1984 [Vol. 10, No. 10]

United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs

1984-10-01 | NHTSA News | PDF

NHTSA News was a semi-monthly employee newsletter prepared by the National Highway Traffic Safety Administration's Executive Secretariat (1975 to circa 1983) and the Office of Public and Consumer Affairs (1984-). The newsletter provided information about projects and current events, employee's accomplishments, personnel changes, and safety tips.

11/24/2025

Title : NHTSA News: October 1984 [Vol. 10, No. 10] Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs Published Date : 1984-10-01 Series : NHTSA News DOI : https://doi.org/10.21949/9wc0-bc77 United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs (1984). NHTSA News: October 1984 [Vol. 10, No. 10]. https://doi.org/10.21949/9wc0-bc77 United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs "NHTSA News: October 1984 [Vol. 10, No. 10]" (1984), https://doi.org/10.21949/9wc0-bc77 United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs "NHTSA News: October 1984 [Vol. 10, No. 10]" , 1984, https://doi.org/10.21949/9wc0-bc77 Export RIS Citation Information. TY - Newsletters A2 - United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs AB - NHTSA News was a semi-monthly employee newsletter prepared by the National Highway Traffic Safety Administration's Executive Secretariat (1975 to circa 1983) and the Office of Public and Consumer Affairs (1984-). The newsletter provided information about projects and current events, employee's accomplishments, personnel changes, and safety tips. AN - dot:87900 DO - https://doi.org/10.21949/9wc0-bc77 ET - Vol. 10, No. 10 KW - News KW - Highway safety KW - Traffic safety KW - Employee communications KW - Government employees KW - Management and organization LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Public and Consumer Affairs PY - 1984-10-01 T2 - NHTSA News TI - NHTSA News: October 1984 [Vol. 10, No. 10] M3 - Newsletters N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/87900 ER -

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