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Showing 41 - 60 of 427 results

I 70 Glenwood Canyon Overlay With Trinidad Lake Asphalt/Steel Slag Hot Mix Asphalt

LaForce, Robert

2006-09-01 | PDF

In 2001, CDOT overlaid twelve miles of I 70 in Glenwood Canyon with a unique asphalt mix design that utilized a traditional Performance Graded Binder blended with Trinidad Lake Asphalt (TLA) and traditional aggregate blended with steel slag aggregate. This is the first project where CDOT has incorporated TLA in the mix design. There are many natura ...

08/24/2026

Title : I 70 Glenwood Canyon Overlay With Trinidad Lake Asphalt/Steel Slag Hot Mix Asphalt Creator(s) : LaForce, Robert Corporate Creator(s) : Yeh and Associates, Inc. Corporate Contributor(s) : Colorado. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2006-09-01 Report Number : CDOT-DTD-R-2005-13 URL : https://rosap.ntl.bts.gov/view/dot/93107
LaForce, Robert (2006). I 70 Glenwood Canyon Overlay With Trinidad Lake Asphalt/Steel Slag Hot Mix Asphalt.

LaForce, Robert "I 70 Glenwood Canyon Overlay With Trinidad Lake Asphalt/Steel Slag Hot Mix Asphalt" (2006)

LaForce, Robert "I 70 Glenwood Canyon Overlay With Trinidad Lake Asphalt/Steel Slag Hot Mix Asphalt" , 2006
Export RIS Citation Information. TY - Tech Report AU - LaForce, Robert A2 - Yeh and Associates, Inc. A3 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - In 2001, CDOT overlaid twelve miles of I 70 in Glenwood Canyon with a unique asphalt mix design that utilized a traditional Performance Graded Binder blended with Trinidad Lake Asphalt (TLA) and traditional aggregate blended with steel slag aggregate. This is the first project where CDOT has incorporated TLA in the mix design. There are many natural deposits of asphalt found around the world; Trinidad Lake is the most famous and has the largest commercial deposit of natural asphalt in the world. This study was designed to evaluate the performance of a pavement containing Trinidad Lake Asphalt blended with a polymer modified asphalt (PG 76-28) in combination with a very hard and angular steel slag under Colorado weather and traffic conditions. Two of three test sections experienced premature failure along the longitudinal construction joint and that failure appears to have been due to inadequate densities along the longitudinal joint rather than due to the mix design. The pavement performed well in all of Test Section 3, and in Test Sections 1 and 2 in areas away from the longitudinal joint. AN - dot:93107 ET - Final Report KW - Asphalt additives KW - Slag KW - Hot mix asphalt KW - Pavement performance KW - Mix design KW - Polymer asphalt KW - Performance tests KW - Steel by properties KW - Trinidad asphalt KW - Longitudinal joints KW - asphalt modifiers LA - English PB - Colorado. Department of Transportation PY - 2006-09-01 SN - CDOT-DTD-R-2005-13 TI - I 70 Glenwood Canyon Overlay With Trinidad Lake Asphalt/Steel Slag Hot Mix Asphalt M3 - Tech Report N1 - United States N1 - 10.38 UR - https://rosap.ntl.bts.gov/view/dot/93107 ER - DB - ROSA P
A Gap Analysis of Existing Database Management Practices and Ontology Development for UDOT Tier 1 Safety Assets

Adams, Brig Dean ;

Esteghamati, Mohsen Zaker

2026-06-01 | PDF

This study evaluates transportation asset data management practices within the Utah Department of Transportation (UDOT) and identifies opportunities to improve data governance, integration, and interoperability through ontology-informed enterprise data management principles. Current practices were assessed through stakeholder surveys, asset databas ...

08/24/2026

Title : A Gap Analysis of Existing Database Management Practices and Ontology Development for UDOT Tier 1 Safety Assets Creator(s) : Adams, Brig Dean;Esteghamati, Mohsen Zaker; Corporate Creator(s) : Utah State University Corporate Contributor(s) : Utah. Department of Transportation. Research and Innovation Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-06-01 Report Number : UT-26.14 URL : https://rosap.ntl.bts.gov/view/dot/93106
Adams, Brig Dean and Esteghamati, Mohsen Zaker (2026). A Gap Analysis of Existing Database Management Practices and Ontology Development for UDOT Tier 1 Safety Assets.

Adams, Brig Dean and Esteghamati, Mohsen Zaker "A Gap Analysis of Existing Database Management Practices and Ontology Development for UDOT Tier 1 Safety Assets" (2026)

Adams, Brig Dean and Esteghamati, Mohsen Zaker "A Gap Analysis of Existing Database Management Practices and Ontology Development for UDOT Tier 1 Safety Assets" , 2026
Export RIS Citation Information. TY - Tech Report AU - Adams, Brig Dean AU - Esteghamati, Mohsen Zaker A2 - Utah State University A3 - Utah. Department of Transportation. Research and Innovation Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This study evaluates transportation asset data management practices within the Utah Department of Transportation (UDOT) and identifies opportunities to improve data governance, integration, and interoperability through ontology-informed enterprise data management principles. Current practices were assessed through stakeholder surveys, asset database reviews, and a gap analysis comparing existing conditions with best practices from the literature on enterprise data management, ontology engineering, and data lake architecture. Findings revealed challenges including fragmented data storage, inconsistent terminology, limited metadata documentation, unclear stewardship responsibilities, and reliance on unstructured condition reporting. These issues reduce data usability, hinder integration efforts, and limit advanced analysis capabilities. To address these challenges, a proof-of-concept ontology and standardized schema were developed for selected transportation safety assets, including barriers, pavement, sign faces, and sign assemblies. The proposed schema introduces structured metadata categories and new fields for asset status, condition, and damage classification to improve consistency and reduce reliance on free-text data entry. Ontology development principles informed the organization of asset concepts, relationships, and metadata, creating a semantic foundation for future enterprise applications. The framework was implemented and validated within Google Cloud Dataplex using business glossaries, metadata catalogs, and data quality rules. Results demonstrated the feasibility of ontology-informed data management practices for improving data discoverability, governance, interoperability, and decision support, while establishing a foundation for future enterprise-wide transportation asset data integration at UDOT. AN - dot:93106 ET - Final Report: Feb 2025 to June 2026 KW - Transportation safety KW - Transportation system management KW - Asset management KW - Data management KW - Data analysis KW - Database management systems KW - Metadata KW - Surveys KW - Transportation Safety Asset Management KW - Data Governance KW - Ontology KW - Data Integration LA - English PB - Utah. Department of Transportation PY - 2026-06-01 SN - UT-26.14 TI - A Gap Analysis of Existing Database Management Practices and Ontology Development for UDOT Tier 1 Safety Assets M3 - Tech Report N1 - United States N1 - 25-8903 UR - https://rosap.ntl.bts.gov/view/dot/93106 ER - DB - ROSA P
Utah SR 73 Eagle Mountain Mule Deer Crosswalk and Wildlife-Detection Driver Warning System Research

Cramer, Patricia ;

Hamlin, Robert

2026-07-01 | PDF

The State Road (SR) 73 Eagle Mountain Wildlife Crosswalk (Crosswalk) and Wildlife-Detection Driver Warning System (the System) were part of wildlife accommodation efforts to reduce mule deer/wildlife-vehicle collisions (WVC) while allowing mule deer migrations to continue across SR 73. These included the 60-feet wide Crosswalk gap in wildlife exclu ...

08/24/2026

Title : Utah SR 73 Eagle Mountain Mule Deer Crosswalk and Wildlife-Detection Driver Warning System Research Creator(s) : Cramer, Patricia;Hamlin, Robert; Corporate Creator(s) : Wildlife Connectivity Institute Corporate Contributor(s) : Utah. Department of Transportation. Research and Innovation Division;United States. Department of Transportation. Federal Highway Administration; Contributor(s) : Black, Todd Published Date : 2026-07-01 Report Number : UT-26.18 URL : https://rosap.ntl.bts.gov/view/dot/93105
Cramer, Patricia and Hamlin, Robert (2026). Utah SR 73 Eagle Mountain Mule Deer Crosswalk and Wildlife-Detection Driver Warning System Research.

Cramer, Patricia and Hamlin, Robert "Utah SR 73 Eagle Mountain Mule Deer Crosswalk and Wildlife-Detection Driver Warning System Research" (2026)

Cramer, Patricia and Hamlin, Robert "Utah SR 73 Eagle Mountain Mule Deer Crosswalk and Wildlife-Detection Driver Warning System Research" , 2026
Export RIS Citation Information. TY - Tech Report AU - Cramer, Patricia AU - Hamlin, Robert A2 - Wildlife Connectivity Institute A3 - Utah. Department of Transportation. Research and Innovation Division A3 - United States. Department of Transportation. Federal Highway Administration A4 - Black, Todd AB - The State Road (SR) 73 Eagle Mountain Wildlife Crosswalk (Crosswalk) and Wildlife-Detection Driver Warning System (the System) were part of wildlife accommodation efforts to reduce mule deer/wildlife-vehicle collisions (WVC) while allowing mule deer migrations to continue across SR 73. These included the 60-feet wide Crosswalk gap in wildlife exclusion fence, and the System. The posted speed limit at the Crosswalk was 55 mph, and the average annual daily traffic was over 10,000. Objectives were to evaluate if and by how much the System affected driver speeds at the Crosswalk and evaluate if the System, together with the wildlife fence and crosswalk, reduced WVC crashes and carcasses. The greatest decreases in speeds in the Crosswalk occurred when the researchers activated the System and stayed out of view. Average speeds of motorists in the Crosswalk with the System activated were 1.4 to 2.8 mph less than speeds in the Crosswalk without System activation. In both tests, the reduced speeds were still above the posted 55 mph speed limit. When mule deer were documented at the Crosswalk and the System was activated, speeds were decreased on average 1.1 mph, to an average of 57.8 mph. There were genuine reductions in carcass and crash densities in the area of the Crosswalk after the completion of all wildlife accommodations. Carcasses were reduced by 83 percent and crashes were reduced by 60 percent. Immediately west of the south wildlife exclusion fence terminus, carcasses increased by 12 percent while crashes increased by 46 percent. AN - dot:93105 ET - Final Report: Aug 2023 to July 2026 KW - Wildlife crossings KW - Animal vehicle crashes KW - Crosswalks KW - Detectors KW - Deer KW - Speed limits KW - Warning systems KW - Fences KW - Wildlife-vehicle conflict KW - Wildlife-vehicle collisions (WVC) KW - Wildlife-Detection System (WDS) KW - Animal detection system (ADS) KW - Driver warning system KW - mule deer KW - speed reductions KW - carcasses KW - wildlife crashes LA - English PB - Utah. Department of Transportation PY - 2026-07-01 SN - UT-26.18 TI - Utah SR 73 Eagle Mountain Mule Deer Crosswalk and Wildlife-Detection Driver Warning System Research M3 - Tech Report N1 - United States N1 - 24-8215 UR - https://rosap.ntl.bts.gov/view/dot/93105 ER - DB - ROSA P
Characterizing TC128 Steel Plasticity for Finite Element Modeling

Carolan, Michael E.

;

Eshraghi, Shaun

2026-08-19 | PDF

The Federal Railroad Administration, through a research program to improve transportation safety for tank cars, sponsored the Volpe National Transportation Systems Center to develop and compare techniques to simulate the plastic stress-strain behavior of Association of American Railroads' TC128, Grade B (TC128) steel [1]. TC128 steel is used in the ...

08/24/2026

Title : Characterizing TC128 Steel Plasticity for Finite Element Modeling Creator(s) : Carolan, Michael E.;Eshraghi, Shaun; Corporate Creator(s) : John A. Volpe National Transportation Systems Center (U.S.) Corporate Contributor(s) : United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology Published Date : 2026-08-19 Report Number : DOT/FRA/ORD-26/14 URL : https://rosap.ntl.bts.gov/view/dot/93104
Carolan, Michael E. and Eshraghi, Shaun (2026). Characterizing TC128 Steel Plasticity for Finite Element Modeling.

Carolan, Michael E. and Eshraghi, Shaun "Characterizing TC128 Steel Plasticity for Finite Element Modeling" (2026)

Carolan, Michael E. and Eshraghi, Shaun "Characterizing TC128 Steel Plasticity for Finite Element Modeling" , 2026
Export RIS Citation Information. TY - Tech Report AU - Carolan, Michael E. AU - Eshraghi, Shaun A2 - John A. Volpe National Transportation Systems Center (U.S.) A3 - United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology A4 - Won, Brian AB - The Federal Railroad Administration, through a research program to improve transportation safety for tank cars, sponsored the Volpe National Transportation Systems Center to develop and compare techniques to simulate the plastic stress-strain behavior of Association of American Railroads' TC128, Grade B (TC128) steel [1]. TC128 steel is used in the construction of tank cars designed to carry hazardous materials. This research took place between 2019 and 2025. AN - dot:93104 ET - May 2019 - May 2025 KW - Finite element method KW - Tank cars KW - Transportation KW - Transportation safety KW - Hazardous materials KW - Rolling stock KW - Side crashes LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2026-08-19 SN - DOT/FRA/ORD-26/14 TI - Characterizing TC128 Steel Plasticity for Finite Element Modeling M3 - Tech Report N1 - United States N1 - 693JJ620N000049 UR - https://rosap.ntl.bts.gov/view/dot/93104 ER - DB - ROSA P
Expanding Summer Youth Programs in Rail through Virtual Learning and a National Campus Network - Phase II

Lautala, Pasi Tapio

;

Nelson, David

2026-08-19 | PDF

FRA supported Michigan Technological University (Michigan Tech), in collaboration with Pennsylvania State University Altoona and the University of Illinois, Urbana-Champaign (UIUC), to establish Tracks to the Future: Railroad Transportation and Engineering, a summer program for high school students. Phase I of this program was offered in the summer ...

08/24/2026

Title : Expanding Summer Youth Programs in Rail through Virtual Learning and a National Campus Network - Phase II Creator(s) : Lautala, Pasi Tapio;Nelson, David;Dick, C. Tyler;Schlake, Bryan W.;Ghoshani, Faeze; Corporate Creator(s) : Michigan Technological University Corporate Contributor(s) : United States. Department of Transportation. Federal Railroad Administration. Office of Research, Demonstration and Innovation Published Date : 2026-08-19 Report Number : DOT/FRA/ORD-26/15 URL : https://rosap.ntl.bts.gov/view/dot/93103
Lautala, Pasi Tapio et al. (2026). Expanding Summer Youth Programs in Rail through Virtual Learning and a National Campus Network - Phase II.

Lautala, Pasi Tapio et al. "Expanding Summer Youth Programs in Rail through Virtual Learning and a National Campus Network - Phase II" (2026)

Lautala, Pasi Tapio et al. "Expanding Summer Youth Programs in Rail through Virtual Learning and a National Campus Network - Phase II" , 2026
Export RIS Citation Information. TY - Tech Report AU - Lautala, Pasi Tapio AU - Nelson, David AU - Dick, C. Tyler AU - Schlake, Bryan W. AU - Ghoshani, Faeze A2 - Michigan Technological University A3 - United States. Department of Transportation. Federal Railroad Administration. Office of Research, Demonstration and Innovation A4 - Wornoff, Jason AB - FRA supported Michigan Technological University (Michigan Tech), in collaboration with Pennsylvania State University Altoona and the University of Illinois, Urbana-Champaign (UIUC), to establish Tracks to the Future: Railroad Transportation and Engineering, a summer program for high school students. Phase I of this program was offered in the summer of 2022 at Michigan Tech, Penn State Altoona, and UIUC (Lautala et al, 2024). In Phase II, the program expanded to three additional universities: the University of South Carolina, University of New Mexico, and California State University, Fresno. The program included 105 students from 18 different states. Most participants were rising eleventh or twelfth grade students. Overall, the Phase II program continued the success of Phase I. Students and parents provided positive feedback for both the remote and in person activities. However, improvements can still be made in the registration process, program logistics, and travel expense reimbursement. AN - dot:93103 ET - 8/2021-7/2022 KW - Railroad engineering KW - Education and training KW - Vocational guidance KW - Workforce KW - Computer online services KW - Outreach KW - Students KW - Transportation careers KW - Workforce development KW - Online education KW - Hybrid education LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2026-08-19 SN - DOT/FRA/ORD-26/15 TI - Expanding Summer Youth Programs in Rail through Virtual Learning and a National Campus Network - Phase II M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93103 ER - DB - ROSA P
FHWA Policy on Agency Force Account Use [Order]

United States. Department of Transportation. Federal Highway Administration

2012-03-12 | PDF

This directive clarifies the Federal Highway Administration (FHWA) policy for the approval of the use of agency force account procedures on Federal-aid projects. This directive clarifies when agency force account is permitted under law and regulation. The directive addresses the use of agency force account procedures which include the direct perfor ...

08/24/2026

Title : FHWA Policy on Agency Force Account Use [Order] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 2012-03-12 URL : https://rosap.ntl.bts.gov/view/dot/93102
United States. Department of Transportation. Federal Highway Administration (2012). FHWA Policy on Agency Force Account Use [Order].

United States. Department of Transportation. Federal Highway Administration "FHWA Policy on Agency Force Account Use [Order]" (2012)

United States. Department of Transportation. Federal Highway Administration "FHWA Policy on Agency Force Account Use [Order]" , 2012
Export RIS Citation Information. TY - Memorandum A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - This directive clarifies the Federal Highway Administration (FHWA) policy for the approval of the use of agency force account procedures on Federal-aid projects. This directive clarifies when agency force account is permitted under law and regulation. The directive addresses the use of agency force account procedures which include the direct performance of work by any direct recipient (typically the State department of transportation (DOT)) or subrecipient of Federal-aid funding under Title 23 of the Code of Federal Regulations (CFR). It does not address the use of contract force account procedures for work performed by construction contractors as referenced in 23 CFR 635.120(d). AN - dot:93102 KW - Contract administration KW - Federal aid KW - Laws and legislation KW - Policy KW - Recommendations LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2012-03-12 TI - FHWA Policy on Agency Force Account Use [Order] M3 - Memorandum N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/93102 ER - DB - ROSA P
23 CFR 635 Contract Procedures

United States. Department of Transportation. Federal Highway Administration

1991-08-02 | PDF

This final rule prescribes policies, requirements, and procedures relating to Federal-aid highway projects from the time of authorization to proceed to the construction stage, to the time of final acceptance by the FHWA. The regulations are being revised to accommodate several policy changes and to clarify and simplify the regulatory requirements p ...

08/24/2026

Title : 23 CFR 635 Contract Procedures Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 1991-08-02 URL : https://rosap.ntl.bts.gov/view/dot/93101
United States. Department of Transportation. Federal Highway Administration (1991). 23 CFR 635 Contract Procedures.

United States. Department of Transportation. Federal Highway Administration "23 CFR 635 Contract Procedures" (1991)

United States. Department of Transportation. Federal Highway Administration "23 CFR 635 Contract Procedures" , 1991
Export RIS Citation Information. TY - Memorandum A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - This final rule prescribes policies, requirements, and procedures relating to Federal-aid highway projects from the time of authorization to proceed to the construction stage, to the time of final acceptance by the FHWA. The regulations are being revised to accommodate several policy changes and to clarify and simplify the regulatory requirements pertaining to the contracting for Federal-aid highway construction. AN - dot:93101 KW - Construction projects KW - Federal aid highways KW - Contract administration KW - Policy KW - Recommendations LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 1991-08-02 TI - 23 CFR 635 Contract Procedures M3 - Memorandum N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/93101 ER - DB - ROSA P
Electric Vehicle Charging Infrastructure Procurement Methods under Special Experimental Project No. 14 (SEP-14) [Memorandum]

Kalla, Hari

2023-07-03 | Memoranda & Guidance | PDF

This memorandum describes Federal Highway Administration (FHWA) policy allowing for the delegation of approval of requests under FHWA's Special Experimental Project No. 14 (SEP-14) experimental authority related to the procurement of certain electric vehicle (EV) charging infrastructure projects, under specified conditions, and on a programmatic ba ...

08/24/2026

Title : Electric Vehicle Charging Infrastructure Procurement Methods under Special Experimental Project No. 14 (SEP-14) [Memorandum] Creator(s) : Kalla, Hari Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 2023-07-03 Series : Memoranda & Guidance URL : https://rosap.ntl.bts.gov/view/dot/93100
Kalla, Hari (2023). Electric Vehicle Charging Infrastructure Procurement Methods under Special Experimental Project No. 14 (SEP-14) [Memorandum].

Kalla, Hari "Electric Vehicle Charging Infrastructure Procurement Methods under Special Experimental Project No. 14 (SEP-14) [Memorandum]" (2023)

Kalla, Hari "Electric Vehicle Charging Infrastructure Procurement Methods under Special Experimental Project No. 14 (SEP-14) [Memorandum]" , 2023
Export RIS Citation Information. TY - Memorandum AU - Kalla, Hari A2 - United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - This memorandum describes Federal Highway Administration (FHWA) policy allowing for the delegation of approval of requests under FHWA's Special Experimental Project No. 14 (SEP-14) experimental authority related to the procurement of certain electric vehicle (EV) charging infrastructure projects, under specified conditions, and on a programmatic basis. AN - dot:93100 KW - Electric vehicles KW - Battery chargers KW - Procurement KW - Competitive bidding KW - Policy KW - Recommendations LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2023-07-03 T2 - Memoranda & Guidance TI - Electric Vehicle Charging Infrastructure Procurement Methods under Special Experimental Project No. 14 (SEP-14) [Memorandum] M3 - Memorandum N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/93100 ER - DB - ROSA P
Expanding Summer Youth Programs in Rail Through Virtual Learning and a National Campus Network - Phase III and Final Report

Lautala, Pasi Tapio

;

Nelson, David

2026-08-19 | PDF

FRA supported Michigan Technological University (Michigan Tech), in collaboration with Pennsylvania State University Altoona (Penn State Altoona) and the University of Illinois, Urbana-Champaign (UIUC), to establish Tracks to the Future: Railroad Transportation and Engineering, a summer program for high school students. Phase I of this program was ...

08/24/2026

Title : Expanding Summer Youth Programs in Rail Through Virtual Learning and a National Campus Network - Phase III and Final Report Creator(s) : Lautala, Pasi Tapio;Nelson, David;Dick, C. Tyler;Schlake, Bryan W.;Ghoshani, Faeze; Corporate Creator(s) : Michigan Technological University Corporate Contributor(s) : United States. Department of Transportation. Federal Railroad Administration. Office of Research, Demonstration and Innovation Published Date : 2026-08-19 Report Number : DOT/FRA/ORD-26/16 URL : https://rosap.ntl.bts.gov/view/dot/93099
Lautala, Pasi Tapio et al. (2026). Expanding Summer Youth Programs in Rail Through Virtual Learning and a National Campus Network - Phase III and Final Report.

Lautala, Pasi Tapio et al. "Expanding Summer Youth Programs in Rail Through Virtual Learning and a National Campus Network - Phase III and Final Report" (2026)

Lautala, Pasi Tapio et al. "Expanding Summer Youth Programs in Rail Through Virtual Learning and a National Campus Network - Phase III and Final Report" , 2026
Export RIS Citation Information. TY - Tech Report AU - Lautala, Pasi Tapio AU - Nelson, David AU - Dick, C. Tyler AU - Schlake, Bryan W. AU - Ghoshani, Faeze A2 - Michigan Technological University A3 - United States. Department of Transportation. Federal Railroad Administration. Office of Research, Demonstration and Innovation A4 - Wornoff, Jason AB - FRA supported Michigan Technological University (Michigan Tech), in collaboration with Pennsylvania State University Altoona (Penn State Altoona) and the University of Illinois, Urbana-Champaign (UIUC), to establish Tracks to the Future: Railroad Transportation and Engineering, a summer program for high school students. Phase I of this program was offered in the summer of 2022 at Michigan Tech, Penn State Altoona, and UIUC. In Phase II (2023), the program expanded to three additional universities: University of South Carolina, University of New Mexico and California State University, Cal State Fresno. In Phase III the program added four more universities: University of District Columbia, University of Nebraska - Lincoln, North Dakota State University and Oregon State University. All cohorts used a hybrid format where students first spent two days participating in live remote sessions via Zoom and completing hands-on activities mailed to them prior to program start. Students then traveled to one of the host campuses for two days of on-campus activities and field visits. FRA funded the course development, the program fees for the students (including meals and housing), and field visit expenses at the host site. Rail industry companies provided limited travel support for students in need to reach the host site. The program reached over 300 registered students from 26 states over the three years studied. Pre- and post-program assessments showed an increase in student knowledge of railway topics, and the engineering belongingness surveys also showed the positive impact created by the program. With proper support, Tracks to the Future can continue to provide important outreach and education for pre-college students interested in rail. AN - dot:93099 ET - 08/2023-07/2024 KW - Railroad engineering KW - Education and training KW - Vocational guidance KW - Workforce KW - Computer online services KW - Outreach KW - Students KW - Transportation careers KW - Workforce development KW - Online education KW - Hybrid education LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2026-08-19 SN - DOT/FRA/ORD-26/16 TI - Expanding Summer Youth Programs in Rail Through Virtual Learning and a National Campus Network - Phase III and Final Report M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93099 ER - DB - ROSA P
The Effects of Surface Condition and Long-Term Environmental Exposure on the Bond Between CFRP and Steel

Yu-Shan, Abril ;

Kassner, Bernard L.

2026-08-01 | PDF

As the existing steel infrastructure inevitably continues to age and deteriorate, engineers are increasingly looking for innovative and effective methods for repairing and maintaining existing steel bridges, which are susceptible to corrosion damage when exposed to aggressive environments and deicing salts. Conventional methods for repairing steel ...

08/24/2026

Title : The Effects of Surface Condition and Long-Term Environmental Exposure on the Bond Between CFRP and Steel Creator(s) : Yu-Shan, Abril;Kassner, Bernard L.;Moruza, Audrey K.;Hebdon, Matthew;Shakiba, Maryam;Carrera, Bernardo;Jiwani, Preet; Corporate Creator(s) : Virginia Transportation Research Council (VTRC);University of Texas at Austin. Department of Civil, Architectural & Environmental Engineering;University of Colorado Boulder;Simpson Gumpertz & Heger Inc.;Walter P Moore; Corporate Contributor(s) : Virginia. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-08-01 Report Number : FHWA/VTRC 27-R04 URL : https://rosap.ntl.bts.gov/view/dot/93098
Yu-Shan, Abril et al. (2026). The Effects of Surface Condition and Long-Term Environmental Exposure on the Bond Between CFRP and Steel.

Yu-Shan, Abril et al. "The Effects of Surface Condition and Long-Term Environmental Exposure on the Bond Between CFRP and Steel" (2026)

Yu-Shan, Abril et al. "The Effects of Surface Condition and Long-Term Environmental Exposure on the Bond Between CFRP and Steel" , 2026
Export RIS Citation Information. TY - Tech Report AU - Yu-Shan, Abril AU - Kassner, Bernard L. AU - Moruza, Audrey K. AU - Hebdon, Matthew AU - Shakiba, Maryam AU - Carrera, Bernardo AU - Jiwani, Preet A2 - Virginia Transportation Research Council (VTRC) A2 - University of Texas at Austin. Department of Civil, Architectural & Environmental Engineering A2 - University of Colorado Boulder A2 - Simpson Gumpertz & Heger Inc. A2 - Walter P Moore A3 - Virginia. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - As the existing steel infrastructure inevitably continues to age and deteriorate, engineers are increasingly looking for innovative and effective methods for repairing and maintaining existing steel bridges, which are susceptible to corrosion damage when exposed to aggressive environments and deicing salts. Conventional methods for repairing steel bridges can be labor intensive and time consuming and add considerable weight to the existing structure. One alternative is to utilize carbon fiber reinforced polymers (CFRPs). Many studies have documented CFRP's ability to enhance the strength of existing structures while having a high strength-to-weight ratio and the added benefit of being noncorrosive. However, most of these studies have focused on the bond behavior between CFRP and steels having a smooth surface condition, which is not representative of deteriorated structures in need of retrofitting. Further research has examined the durability of CFRP-steel bonds but under conditions that do not reflect the service life conditions for typical bridge applications. This study examined the effects of the surface condition and environmental exposure on the bond between steel and two different CFRP materials, one having a normal modulus and the other an ultra-high modulus. The researchers evaluated the influence of corrosion and simulated corrosion pitting to determine whether structures with non-uniform surfaces are viable candidates for CFRP retrofits. In addition, the durability of CFRP-steel bonded, double-strap jointed specimens was investigated through laboratory hygrothermal aging and chloride exposure, as well as in situ environmental conditioning to multiple environments in Virginia. The study also included a small subset of fatigue-tested specimens, as well as a hypothetical in situ cost comparison to assess the economics of strengthening steel structures using the CFRP materials used in this project. The results showed that although a corroded steel surface does require a longer bond length compared with a smooth surface, a pitted surface due to corrosion has no negative effect on the bond strength between CFRP and steel. Furthermore, exposure to chlorides does not appear to affect that bond strength. However, strength reduction factors for hygrothermal and environmental aging should be included in the design to account for exposure to given conditions. Nevertheless, CFRP is a cost-effective method for strengthening corrosion-damaged steel members with moderate levels of surface pitting. The research can be useful in the development of guidelines that will assist engineers determine if a CFRP retrofit solution is applicable in a given environmental setting and appropriate for the level of deterioration of the structure. AN - dot:93098 ET - Final Report KW - Carbon fiber reinforced polymers KW - Steel KW - Durability KW - Corrosion KW - Environmental impacts KW - Economic impacts KW - Fatigue tests KW - Deicing KW - Steel bridges KW - Freeze thaw tests KW - bond KW - hygrothermal KW - corroded surface KW - environmental exposure KW - economic comparison LA - English PB - Virginia Transportation Research Council (VTRC) PY - 2026-08-01 SN - FHWA/VTRC 27-R04 TI - The Effects of Surface Condition and Long-Term Environmental Exposure on the Bond Between CFRP and Steel M3 - Tech Report N1 - United States N1 - 115768 UR - https://rosap.ntl.bts.gov/view/dot/93098 ER - DB - ROSA P
Life Cycle Cost Analysis and Discount Rate on Pavements for the Colorado Department of Transportation

Demos, George Paul

2006-10-01 | PDF

This report provides information on life cycle cost analysis (LCCA) as applied to CDOT's roadways. It describes the methodology CDOT uses to select discount rates to be used in LCCA calculations. It also summarizes pavement selection terminology for deterministic and probabilistic LCCA procedures.

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Title : Life Cycle Cost Analysis and Discount Rate on Pavements for the Colorado Department of Transportation Creator(s) : Demos, George Paul Corporate Creator(s) : Colorado. Dept. of Transportation. Materials and Geotechnical Branch Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2006-10-01 Report Number : CDOT-2006-17 URL : https://rosap.ntl.bts.gov/view/dot/93097
Demos, George Paul (2006). Life Cycle Cost Analysis and Discount Rate on Pavements for the Colorado Department of Transportation.

Demos, George Paul "Life Cycle Cost Analysis and Discount Rate on Pavements for the Colorado Department of Transportation" (2006)

Demos, George Paul "Life Cycle Cost Analysis and Discount Rate on Pavements for the Colorado Department of Transportation" , 2006
Export RIS Citation Information. TY - Tech Report AU - Demos, George Paul A2 - Colorado. Dept. of Transportation. Materials and Geotechnical Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - This report provides information on life cycle cost analysis (LCCA) as applied to CDOT's roadways. It describes the methodology CDOT uses to select discount rates to be used in LCCA calculations. It also summarizes pavement selection terminology for deterministic and probabilistic LCCA procedures. AN - dot:93097 ET - Final Report KW - Life cycle costing KW - Life cycle analysis KW - Present value KW - Rehabilitation KW - Salvage KW - Benefit cost analysis KW - Inflation KW - Maintenance KW - State departments of transportation KW - Roads KW - Pavement design KW - rehabilitation cycles KW - user costs KW - probabilistic LCCA KW - deterministic LCCA KW - salvage value KW - maintenance costs LA - English PB - Colorado. Department of Transportation PY - 2006-10-01 SN - CDOT-2006-17 TI - Life Cycle Cost Analysis and Discount Rate on Pavements for the Colorado Department of Transportation M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93097 ER - DB - ROSA P
Fire Hazards of Aerosol Cans in Aircraft Cargo Compartments

Blake, David

1989-12-01 | PDF

The purpose of this project was to determine the hazards associated with aerosol cans involved in cargo fires. Over the last several years the chlorofluorocarbon propellant used in aerosol cans has been replaced with hydrocarbons such as butane, propane, and isobutane. These flammable gases would normally be prohibited on passenger carrying airplan ...

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Title : Fire Hazards of Aerosol Cans in Aircraft Cargo Compartments Creator(s) : Blake, David Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1989-12-01 Report Number : DOT/FAA/CT-89/32 URL : https://rosap.ntl.bts.gov/view/dot/93096
Blake, David (1989). Fire Hazards of Aerosol Cans in Aircraft Cargo Compartments.

Blake, David "Fire Hazards of Aerosol Cans in Aircraft Cargo Compartments" (1989)

Blake, David "Fire Hazards of Aerosol Cans in Aircraft Cargo Compartments" , 1989
Export RIS Citation Information. TY - Tech Report AU - Blake, David A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - The purpose of this project was to determine the hazards associated with aerosol cans involved in cargo fires. Over the last several years the chlorofluorocarbon propellant used in aerosol cans has been replaced with hydrocarbons such as butane, propane, and isobutane. These flammable gases would normally be prohibited on passenger carrying airplanes but there is an exception for up to 75 ounces per person for medicinal and toilet articles when carried in checked baggage only. Seven fire tests involving aerosol cans were conducted in an 800-cubic-foot cargo compartment. The main conclusions of the study were that hydrocarbon propellants in aerosol cans increase the damage potential of luggage fires; the fires in a simulated Class D compartment where aerosol cans ruptured and ignited were not contained; a Class C compartment provides significantly more protection against aerosol can fire threat than than does a Class D compartment; an aerosol can rupturing and igniting in a class D or Class C cargo compartment would eliminate the compartments ability to control ventilations and drafts; and aerosol cans would be exposed to elevated temperatures for a longer period of time in a luggage fire in a Class D compartment than in a Class C compartment. AN - dot:93096 ET - Final Report KW - Aerosols KW - Air cargo KW - Air transportation KW - Airplanes KW - Commodities KW - Fires KW - Freight traffic LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1989-12-01 SN - DOT/FAA/CT-89/32 TI - Fire Hazards of Aerosol Cans in Aircraft Cargo Compartments M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93096 ER - DB - ROSA P
Smoke and Extinguisher Agent Dissipation in a Small Pressurized Fuselage

Slusher, G. R. ;

Abramowitz, A.

1990-11-01 | PDF

A test study was conducted using Halon 1211 and Halon 1301 fire extinguishing agents and aerosol smoke to study their behavior in a pressurized Cessna C-421B aircraft. Halon fire extinguishers were discharged and monitored at various locations to determine the concentrations of neat halon gases present, their dissipation rates and any resultant tox ...

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Title : Smoke and Extinguisher Agent Dissipation in a Small Pressurized Fuselage Creator(s) : Slusher, G. R.;Abramowitz, A.;Neese, W. E.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1990-11-01 Report Number : DOT/FAA/CT-89/31 URL : https://rosap.ntl.bts.gov/view/dot/93095
Slusher, G. R. et al. (1990). Smoke and Extinguisher Agent Dissipation in a Small Pressurized Fuselage.

Slusher, G. R. and Abramowitz, A. and Neese, W. E. "Smoke and Extinguisher Agent Dissipation in a Small Pressurized Fuselage" (1990)

Slusher, G. R. et al. "Smoke and Extinguisher Agent Dissipation in a Small Pressurized Fuselage" , 1990
Export RIS Citation Information. TY - Tech Report AU - Slusher, G. R. AU - Abramowitz, A. AU - Neese, W. E. A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - A test study was conducted using Halon 1211 and Halon 1301 fire extinguishing agents and aerosol smoke to study their behavior in a pressurized Cessna C-421B aircraft. Halon fire extinguishers were discharged and monitored at various locations to determine the concentrations of neat halon gases present, their dissipation rates and any resultant toxic threat to the occupants. Artificial smoke was also generated at various locations and was measured at three fixed locations in the aircraft, thereby providing localized visibility information as well as ventilation data. Peak halon concentrations were considered adequate to extinguish most fires. Halon dosages for the pilot and copilot were low or zero and those for the passengers were also low in relation to the toxic limits recommended. AN - dot:93095 ET - Final Report KW - Fire extinguishing agents KW - Smoke KW - Ventilation systems KW - Poisons KW - Visibility LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1990-11-01 SN - DOT/FAA/CT-89/31 TI - Smoke and Extinguisher Agent Dissipation in a Small Pressurized Fuselage M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93095 ER - DB - ROSA P
Statistics on Aircraft Gas Turbine Engine Rotor Failures That Occurred I N U. S. Commercial Aviation During 1986

DeLucia, R. A. ;

Salvino, J. T.

1990-01-01 | PDF

This report presents statistical information relating to gas turbine engine rotor failures which occurred during 1986 in U.S. commercial aviation service use. Two hundred forty-nine failures occurred in 1986. Rotor fragments were generated in 140 of the failures, and of these 16 were uncontained. The predominant failure involved blade fragments, 93 ...

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Title : Statistics on Aircraft Gas Turbine Engine Rotor Failures That Occurred I N U. S. Commercial Aviation During 1986 Creator(s) : DeLucia, R. A.;Salvino, J. T.;Fenton, B. C.; Corporate Creator(s) : Naval Air Propulsion Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1990-01-01 Report Number : DOT/FAA/CT-89 130 URL : https://rosap.ntl.bts.gov/view/dot/93094
DeLucia, R. A. et al. (1990). Statistics on Aircraft Gas Turbine Engine Rotor Failures That Occurred I N U. S. Commercial Aviation During 1986.

DeLucia, R. A. and Salvino, J. T. and Fenton, B. C. "Statistics on Aircraft Gas Turbine Engine Rotor Failures That Occurred I N U. S. Commercial Aviation During 1986" (1990)

DeLucia, R. A. et al. "Statistics on Aircraft Gas Turbine Engine Rotor Failures That Occurred I N U. S. Commercial Aviation During 1986" , 1990
Export RIS Citation Information. TY - Tech Report AU - DeLucia, R. A. AU - Salvino, J. T. AU - Fenton, B. C. A2 - Naval Air Propulsion Center A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This report presents statistical information relating to gas turbine engine rotor failures which occurred during 1986 in U.S. commercial aviation service use. Two hundred forty-nine failures occurred in 1986. Rotor fragments were generated in 140 of the failures, and of these 16 were uncontained. The predominant failure involved blade fragments, 93 percent of which were contained. Two disk failures occurred and all were uncontained. Sixty-five percent of the 249 failures occurred during the takeoff and climb stages of flight. AN - dot:93094 ET - Final Report KW - 20th century KW - Aeronautics KW - Aircraft KW - Airplanes KW - Crashes KW - Gas turbines KW - Statistics KW - Turbine engines LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1990-01-01 SN - DOT/FAA/CT-89 130 TI - Statistics on Aircraft Gas Turbine Engine Rotor Failures That Occurred I N U. S. Commercial Aviation During 1986 M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93094 ER - DB - ROSA P
The NASA Digital VGH Program - Exploration of Methods and Final Results: Volume II - L 1011 Data 1978-1979: 1619 Hours

Crabill, Norman L.

1989-12-01 | PDF

Two hundred hours of Lockheed L 1011 digital flight data recorder data taken in 1973 were used to develop methods and procedures for obtaining statistical data useful for updating airliner airworthiness design criteria. Five thousand hours of additional data taken in 1978 to 1982 are reported in volumes 2, 3, 4 and 5.

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Title : The NASA Digital VGH Program - Exploration of Methods and Final Results: Volume II - L 1011 Data 1978-1979: 1619 Hours Creator(s) : Crabill, Norman L. Corporate Creator(s) : Eagle Engineering, Incorporated Corporate Contributor(s) : United States. National Aeronautics and Space Administration Published Date : 1989-12-01 Report Number : DOT/FAA -CT- 89/36 - II URL : https://rosap.ntl.bts.gov/view/dot/93093
Crabill, Norman L. (1989). The NASA Digital VGH Program - Exploration of Methods and Final Results: Volume II - L 1011 Data 1978-1979: 1619 Hours.

Crabill, Norman L. "The NASA Digital VGH Program - Exploration of Methods and Final Results: Volume II - L 1011 Data 1978-1979: 1619 Hours" (1989)

Crabill, Norman L. "The NASA Digital VGH Program - Exploration of Methods and Final Results: Volume II - L 1011 Data 1978-1979: 1619 Hours" , 1989
Export RIS Citation Information. TY - Tech Report AU - Crabill, Norman L. A2 - Eagle Engineering, Incorporated A3 - United States. National Aeronautics and Space Administration AB - Two hundred hours of Lockheed L 1011 digital flight data recorder data taken in 1973 were used to develop methods and procedures for obtaining statistical data useful for updating airliner airworthiness design criteria. Five thousand hours of additional data taken in 1978 to 1982 are reported in volumes 2, 3, 4 and 5. AN - dot:93093 ET - Volume 2 of 5 KW - Video imaging detectors KW - Vibration KW - Artificial satellites KW - Remote sensing KW - Atmospheric phenomena LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1989-12-01 SN - DOT/FAA -CT- 89/36 - II TI - The NASA Digital VGH Program - Exploration of Methods and Final Results: Volume II - L 1011 Data 1978-1979: 1619 Hours M3 - Tech Report N1 - United States N1 - Contract NASW 4430 UR - https://rosap.ntl.bts.gov/view/dot/93093 ER - DB - ROSA P
Business Impacts of Express Toll Lanes on Existing Facilities

Keen, David ;

Pickton, Todd

2006-11-01 | PDF

This study examines the potential economic effects, business perceptions and impacts to firms from developing express toll lanes in existing highway corridors in the Denver Metropolitan Area. The study team interviewed elected officials, economic development and chamber of commerce representatives, and key businesses in Denver and in five case stud ...

08/24/2026

Title : Business Impacts of Express Toll Lanes on Existing Facilities Creator(s) : Keen, David;Pickton, Todd;Clements, Janet;Felsburg, Robert W.; Corporate Creator(s) : BBC Research & Consulting;Felsburg Holt & Ullevig; Corporate Contributor(s) : Colorado. Department of Transportation. Division of Transportation Development;United States. Department of Transportation. Federal Highway Administration; Published Date : 2006-11-01 Report Number : CDOT-2006-14 URL : https://rosap.ntl.bts.gov/view/dot/93092
Keen, David et al. (2006). Business Impacts of Express Toll Lanes on Existing Facilities.

Keen, David et al. "Business Impacts of Express Toll Lanes on Existing Facilities" (2006)

Keen, David et al. "Business Impacts of Express Toll Lanes on Existing Facilities" , 2006
Export RIS Citation Information. TY - Tech Report AU - Keen, David AU - Pickton, Todd AU - Clements, Janet AU - Felsburg, Robert W. A2 - BBC Research & Consulting A2 - Felsburg Holt & Ullevig A3 - Colorado. Department of Transportation. Division of Transportation Development A3 - United States. Department of Transportation. Federal Highway Administration AB - This study examines the potential economic effects, business perceptions and impacts to firms from developing express toll lanes in existing highway corridors in the Denver Metropolitan Area. The study team interviewed elected officials, economic development and chamber of commerce representatives, and key businesses in Denver and in five case study cities to identify potential key issues and perceptions associated with express toll lanes. The study team also conducted a review of recent literature. Based on this research, the following potential impacts to businesses were identified: customer access to businesses; ability to make calls on customers or make deliveries; ease of obtaining supplies; traffic on local arterials; economic development and other concerns. The study team conducted interviews with 150 businesses in two Denver area highway corridors currently being examined for express toll lanes. These interviews gauged whether business owners and managers thought they would be positively or negatively affected by the proposed toll lanes. In order to compare local perspectives with current experience and to gain a better understanding of the general economic implications of express toll lanes, the study team interviewed 50 businesses in each of the five case study corridors. Interview topics were similar to those in the interviews with Denver area businesses. The study team analyzed the results of the interviews for trends across business type, business size, and business location. In analyzing the interview results for each of the case study corridors, the study team evaluated how each of the project's unique characteristics might apply to the express toll lanes CDOT has proposed for the Denver Metro Area. AN - dot:93092 ET - Final Report KW - Economic impacts KW - Case studies KW - Managed lanes KW - Toll roads KW - Highway corridors KW - Metropolitan areas KW - Interviewing KW - Businesses KW - Trade KW - Literature reviews KW - US 36 KW - C-470 LA - English PB - Colorado. Department of Transportation PY - 2006-11-01 SN - CDOT-2006-14 TI - Business Impacts of Express Toll Lanes on Existing Facilities M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93092 ER - DB - ROSA P
2005 Colorado DOT Tire/Pavement Noise Study

Hanson, Douglas I. ;

Waller, Brian

2006-11-01 | PDF

In the fall of 2003, NCAT conducted a study to determine the tire/pavement noise characteristics of 13 Hot Mix Asphalt (HMA) and 6 Portland Cement Concrete Pavements (PCCP) in Colorado. In the fall of 2004, NCAT was asked to conduct another tire/pavement noise study for the Colorado DOT. Fifteen HMA and six PCCP surfaces were tested. In addition a ...

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Title : 2005 Colorado DOT Tire/Pavement Noise Study Creator(s) : Hanson, Douglas I.;Waller, Brian; Corporate Creator(s) : Auburn University. National Center for Asphalt Technology Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration; Published Date : 2006-11-01 Report Number : CDOT-2006-18 URL : https://rosap.ntl.bts.gov/view/dot/93091
Hanson, Douglas I. and Waller, Brian (2006). 2005 Colorado DOT Tire/Pavement Noise Study.

Hanson, Douglas I. and Waller, Brian "2005 Colorado DOT Tire/Pavement Noise Study" (2006)

Hanson, Douglas I. and Waller, Brian "2005 Colorado DOT Tire/Pavement Noise Study" , 2006
Export RIS Citation Information. TY - Tech Report AU - Hanson, Douglas I. AU - Waller, Brian A2 - Auburn University. National Center for Asphalt Technology A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - In the fall of 2003, NCAT conducted a study to determine the tire/pavement noise characteristics of 13 Hot Mix Asphalt (HMA) and 6 Portland Cement Concrete Pavements (PCCP) in Colorado. In the fall of 2004, NCAT was asked to conduct another tire/pavement noise study for the Colorado DOT. Fifteen HMA and six PCCP surfaces were tested. In addition a short PCC pavement test section built to evaluate various textures was evaluated. In 2005 NCAT was asked to test the same sites that were tested in 2004. This paper provides the results of the 2003, 2004, and 2005 testing. This testing was done by NCAT using a close proximity noise trailer that was built in accordance with the requirements of ISO Standard 11819-2. It was found in this study that the noise levels of both the HMA and the PCCP pavements in Colorado do increase with age, but at a very slow rate and that the rate of increase varies with the pavement type tested. AN - dot:93091 ET - Final Report KW - Traffic noise KW - Surface texture tests KW - Acoustic properties KW - Pavement performance KW - Tire/pavement noise KW - Portland cement concrete KW - Hot mix asphalt KW - Testing KW - acoustic energy KW - close-proximity noise testing LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2006-11-01 SN - CDOT-2006-18 TI - 2005 Colorado DOT Tire/Pavement Noise Study M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93091 ER - DB - ROSA P
Implementing and Testing the Safety of Non-Motorized Road Users through Connected Everything and Traffic Signal Operations in Virtual Reality

Vukojevic, Marko

;

Erdagi, Ismet Goksad

2025-10-01 | PDF

This project developed an integrated digital twin-based human-in-the-loop simulation framework to study traveler interactions under controlled and realistic conditions. The framework coupled PTV Vissim, which managed background traffic operations and signal control through detailed microsimulation, with CARLA, which provided an immersive, physics-b ...

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Title : Implementing and Testing the Safety of Non-Motorized Road Users through Connected Everything and Traffic Signal Operations in Virtual Reality Creator(s) : Vukojevic, Marko;Erdagi, Ismet Goksad;Knezevic, Milan;Stevanovic, Aleksandar;Mu, Zeyu;Park, B. Brian; Corporate Creator(s) : University of Pittsburgh;University of Virginia;Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center; 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; Published Date : 2025-10-01 Report Number : SM20 URL : https://rosap.ntl.bts.gov/view/dot/93090
Vukojevic, Marko et al. (2025). Implementing and Testing the Safety of Non-Motorized Road Users through Connected Everything and Traffic Signal Operations in Virtual Reality.

Vukojevic, Marko et al. "Implementing and Testing the Safety of Non-Motorized Road Users through Connected Everything and Traffic Signal Operations in Virtual Reality" (2025)

Vukojevic, Marko et al. "Implementing and Testing the Safety of Non-Motorized Road Users through Connected Everything and Traffic Signal Operations in Virtual Reality" , 2025
Export RIS Citation Information. TY - Tech Report AU - Vukojevic, Marko AU - Erdagi, Ismet Goksad AU - Knezevic, Milan AU - Stevanovic, Aleksandar AU - Mu, Zeyu AU - Park, B. Brian A2 - University of Pittsburgh A2 - University of Virginia A2 - Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center 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 - This project developed an integrated digital twin-based human-in-the-loop simulation framework to study traveler interactions under controlled and realistic conditions. The framework coupled PTV Vissim, which managed background traffic operations and signal control through detailed microsimulation, with CARLA, which provided an immersive, physics-based virtual environment for real-time participation of human drivers, bicyclists, and pedestrians. Together, these components created a synchronized virtual replica of the Delaware Avenue corridor, enabling systematic testing of vehicle-to-pedestrian, vehicle-to-bicyclist, vehicle-to-infrastructure, and bicycle-to-infrastructure communication strategies. The first group of experiments examined how connectivity-based communication affects pedestrian behavior and decision-making at intersections, providing a deeper understanding of the mechanisms by which information exchange can enhance safety in complex crossing scenarios. The second group focused on driver-bicyclist conflicts, introducing a novel dual-simulator configuration where both agents operated simultaneously within a shared connected environment. This setup successfully reproduced measurable conflict situations-defined through surrogate safety indicators and physiological responses-demonstrating that such systems can realistically replicate stress-inducing events comparable to real-world near misses. By validating a Digital Twin framework that merges physical realism, human interaction, and connected communication, this research advances experimental methodologies for assessing multimodal safety and provides a foundation for evaluating future connected and automated mobility applications. AN - dot:93090 ET - Final Report KW - Loop detectors KW - Digital twins KW - Connectivity KW - Pedestrians KW - Cyclists KW - Traffic conflicts KW - Implementation KW - Testing KW - Nonmotorized transportation KW - Vulnerable road users KW - Vehicle to everything communications KW - Vehicle to infrastructure communications KW - Decision making KW - Drivers KW - Human factors KW - Human-in-the-loop Simulation (HILS) KW - Connectivity Technologies KW - Bicyclist-Vehicle Conflicts LA - English PB - Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center PY - 2025-10-01 SN - SM20 TI - Implementing and Testing the Safety of Non-Motorized Road Users through Connected Everything and Traffic Signal Operations in Virtual Reality M3 - Tech Report N1 - United States N1 - 69A3552348303 UR - https://rosap.ntl.bts.gov/view/dot/93090 ER - DB - ROSA P
Study of the Engine Bird Ingestion Experience of the Boeing 737 Aircraft (October 1986 - September 1988)

Hovey, Peter W. ;

Skinn, Donald A.

1990-05-01 | PDF

The Federal Aviation Administration (FAA) Technical Center initiated a study in October 1986 to determine the numbers, sizes, and types of birds which are being ingested into medium and large inlet area turbofan engines and to determine what damage, if any, results. Bird ingestion data are being collected for the Boeing-737 model aircraft which use ...

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Title : Study of the Engine Bird Ingestion Experience of the Boeing 737 Aircraft (October 1986 - September 1988) Creator(s) : Hovey, Peter W.;Skinn, Donald A.; Corporate Creator(s) : University of Dayton. Research Institute. Structural Integrity Division Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1990-05-01 Report Number : DOT/FAA/CT-89/29 URL : https://rosap.ntl.bts.gov/view/dot/93089
Hovey, Peter W. and Skinn, Donald A. (1990). Study of the Engine Bird Ingestion Experience of the Boeing 737 Aircraft (October 1986 - September 1988).

Hovey, Peter W. and Skinn, Donald A. "Study of the Engine Bird Ingestion Experience of the Boeing 737 Aircraft (October 1986 - September 1988)" (1990)

Hovey, Peter W. and Skinn, Donald A. "Study of the Engine Bird Ingestion Experience of the Boeing 737 Aircraft (October 1986 - September 1988)" , 1990
Export RIS Citation Information. TY - Tech Report AU - Hovey, Peter W. AU - Skinn, Donald A. A2 - University of Dayton. Research Institute. Structural Integrity Division A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - The Federal Aviation Administration (FAA) Technical Center initiated a study in October 1986 to determine the numbers, sizes, and types of birds which are being ingested into medium and large inlet area turbofan engines and to determine what damage, if any, results. Bird ingestion data are being collected for the Boeing-737 model aircraft which uses either the Pratt and Whitney JT8D medium inlet area turbofan engine or the CFM International CFM56 large inlet area turbofan engine. This interim report analyzes the first of 3 years of data collection. The first year extends from October 1986 through September 1987. AN - dot:93089 KW - Bird strikes KW - Turbine engines KW - Turbofan engines KW - Statistical analysis KW - Aeronautics KW - Bird pests KW - Equipment blades LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1990-05-01 SN - DOT/FAA/CT-89/29 TI - Study of the Engine Bird Ingestion Experience of the Boeing 737 Aircraft (October 1986 - September 1988) M3 - Tech Report N1 - United States N1 - DTFAO3-88-C-00024 UR - https://rosap.ntl.bts.gov/view/dot/93089 ER - DB - ROSA P
Calibration Technique for Heat Flux Sensors Used in Fire Experiments and Standard Fire Tests

Steckler, K. ;

Tu, K.

1990-04-01 | PDF

A means of calibrating total heat flux gauges using a comparative (substitution) technique has been established. An apparatus consisting of a reference radiometer, a stable infrared radiant heater capable of producing flux levels up to 3.7 W/cm2, and a precision alignment mechanism has been constructed. The reference radiometer was characterized by ...

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Title : Calibration Technique for Heat Flux Sensors Used in Fire Experiments and Standard Fire Tests Creator(s) : Steckler, K.;Tu, K.;Twilley, W.; Corporate Creator(s) : National Institute of Standards and Technology (U.S.). Fire Research Division Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1990-04-01 Report Number : DOT/FAA/CT-89/26 URL : https://rosap.ntl.bts.gov/view/dot/93088
Steckler, K. et al. (1990). Calibration Technique for Heat Flux Sensors Used in Fire Experiments and Standard Fire Tests.

Steckler, K. and Tu, K. and Twilley, W. "Calibration Technique for Heat Flux Sensors Used in Fire Experiments and Standard Fire Tests" (1990)

Steckler, K. et al. "Calibration Technique for Heat Flux Sensors Used in Fire Experiments and Standard Fire Tests" , 1990
Export RIS Citation Information. TY - Tech Report AU - Steckler, K. AU - Tu, K. AU - Twilley, W. A2 - National Institute of Standards and Technology (U.S.). Fire Research Division A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - A means of calibrating total heat flux gauges using a comparative (substitution) technique has been established. An apparatus consisting of a reference radiometer, a stable infrared radiant heater capable of producing flux levels up to 3.7 W/cm2, and a precision alignment mechanism has been constructed. The reference radiometer was characterized by the Radiometric Physics Division of the National Institute of Standards and Technology at flux levels in the range of 0.8 mW/cm2 to 0.9 W/cm2. Its accuracy was found to be within 3 percent over this range which spans 3 orders of magnitude. As the radiometer is a highly linear thermocouple-based device having a self-calibration feature, this accuracy is expected to hold up to 4.2 W/cm2, the upper limit of this device. Although the overall accuracy of calibrations performed in the new apparatus must still be established, it is expected to be within 3 to 5 percent. AN - dot:93088 ET - Final Report KW - Calibration KW - Calorimeters KW - Fire resistance KW - Fluxes KW - Heat KW - Heat flux KW - Radiometers LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1990-04-01 SN - DOT/FAA/CT-89/26 TI - Calibration Technique for Heat Flux Sensors Used in Fire Experiments and Standard Fire Tests M3 - Tech Report N1 - United States N1 - DTFA03-88-A-00020 UR - https://rosap.ntl.bts.gov/view/dot/93088 ER - DB - ROSA P

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