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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 3801 - 3820 of 36011 results
  • LargeScale Laboratory Testing of Geosynthetics in Roadway Applications
    Large-Scale Laboratory Testing of Geosynthetics in Roadway Applications
    Perkins, Steve ;
    Cuelho, Eli
    2021-03-01 | PDF
    This project studied the performance of geotextile-reinforced test sections when compared to an unreinforced case to assess benefit in terms of an extension of the life of the pavement. A single test track was constructed in an indoor test facility and contained two test sections with a reinforcement geotextile (woven and non-woven) while the third ...
  • Performance Characteristics of InService Bridges for Enhancing Load Ratings Leveraging Refined Analysis Methods
    Performance Characteristics of In-Service Bridges for Enhancing Load Ratings: Leveraging Refined Analysis Methods
    Harris, Devin K. ;
    Ozbulut, Osman E.
    2021-03-01 | PDF
    Bridge load rating assesses the safe live load carrying capacity of an existing or newly designed structure. In addition to load rating with previously defined standard load rating vehicles, the Federal Highway Administration issued additional guidance to states related to rating requirements for all the bridges with respect to specialized hauling ...
  • Technology Transfer Program 20172020
    Technology Transfer Program, 2017–2020
    Aimen, David ;
    Bull, Catherine
    2021-03-01 | PDF
    The NJDOT Technology Transfer (T2) Program, 2017-2020 focused on the development and implementation of a program to increase the level of awareness concerning transportation-related issues within New Jersey, promote an ongoing exchange of ideas, translate the latest state-of-the art trends and technology practices, showcase innovation, and promote ...
  • Evaluation of Tapered Bridge Bearing Pads
    Evaluation of Tapered Bridge Bearing Pads
    Consolazio, Gary R. ;
    Hamilton, H. R. (Trey)
    2021-03-01 | PDF
    Steel-reinforced elastomeric bearing pads are widely used in bridge construction to vertically support girders on piers while also accommodating translational and rotational girder deformations caused by live loads and temperature changes. To support sloped girders, flat bearing pads of uniform thicknesses are typically used with either tapered ste ...
  • CorrosionResistant Steel Fastener Assemblies for ASTM A709 Grade 50CR Steel Bridges
    Corrosion-Resistant Steel Fastener Assemblies for ASTM A709 Grade 50CR Steel Bridges
    Provines, Jason T. ;
    Moruza, Audrey K.
    2021-03-01 | PDF
    The purpose of this study was to evaluate three types of corrosion-resistant steel fastener assemblies for use on ASTM A709 Grade 50CR (hereinafter “50CR”) steel bridges. The three types were ASTM A193 Grade B8 Class 2 (hereinafter “A193 B8-2”); Type 2205 duplex stainless steel (hereinafter “2205”); and bolts made from a martensitic chromium alloy ...
  • Initial Project Estimates for Design Right of Way Utilities and Construction
    Initial Project Estimates for Design, Right of Way, Utilities, and Construction
    Van Dyke, Christopher ;
    Gibson, Bryan
    2021-03-01 | PDF
    Estimating the cost of highway construction projects is among the more challenging tasks state transportation agencies routinely deal with. Developing accurate estimates is a particularly fraught exercise during the planning and scoping phases, when projects have not been thoroughly defined and information on specifics is in short supply. While the ...
  • Putting Research into Practice Improving Winter Road Weather Alerts on Highway Dynamic Message Signs
    Putting Research into Practice: Improving Winter Road Weather Alerts on Highway Dynamic Message Signs
    Gallagher, Mark
    2021-03-01 | PDF
    The project’s goal was to automate blizzard and other selected National Weather Service winter weather alerts on appropriate DMS along Minnesota highways. Supporting objectives included investigation of other state agencies’ DMS best practices and assessment of the public’s perception of DMS blizzard warnings to better meet motorists’ needs and exp ...
  • Minnesota Seal Coat Handbook 2021
    Minnesota Seal Coat Handbook 2021
    Ulring, Joel D ;
    Wood, Thomas J.
    2021-03-01 | PDF
    This is the second revision of this handbook which was originally written in 1996. This update to the handbook, although still titled Minnesota Seal Coat Handbook, has changed all references of Seal Coat to Chip Seal, better aligning it with other state Department of Transportation’s (DOT‘s), Federal Highway Administration (FHWA), and industry. Min ...
  • Evaluation of the Monroe Expressway Wrong Way Vehicle Detection Program
    Evaluation of the Monroe Expressway Wrong Way Vehicle Detection Program
    Chase, R. Thomas ;
    Cunningham, Christopher M.
    2021-03-01 | PDF
    In North Carolina, wrong way driving (WWD) crashes are one of the most severe traffic crashes that often result in a fatality or serious injury since they involve head-on or opposite direction sideswipe crashes at high speeds. To minimize the occurrence of WWD crashes, the North Carolina Turnpike Authority (NCTA), which is a unit of the North Carol ...
  • Generating Traffic Information From Connected Vehicle V2V Basic Safety Messages
    Generating Traffic Information From Connected Vehicle V2V Basic Safety Messages
    Levin, Michael W. ;
    Chen, Rongsheng
    2021-03-01 | PDF
    Basic Safety Message (BSM) containing data about the vehicle's position, speed, and acceleration. Roadside receivers, RSUs, can capture BSM broadcasts and translate them into information about traffic conditions. If every vehicle is equipped with awareness, BSMs can be combined to calculate traffic flows, speeds, and densities. These three key para ...
  • Evaluation of Current Technologies for Training Web Apps and New Technologies
    Evaluation of Current Technologies for Training, Web Apps, and New Technologies
    Iyer, Ananth V ;
    Dunlop, Steven R
    2021-03-01 | PDF
    This report details the activities conducted to assess the feasibility of using new technology tools for safety training. Utilizing established research studies, risk frameworks, and vendor quotations, we compared the different attributes of training methods such as Traditional Training (classroom/presentations), LMS (Learning Management System) ba ...
  • Uses and Challenges of Collecting LiDAR Data From a Growing Autonomous Vehicle Fleet Implications for Infrastructure Planning and Inspection Practices
    Uses and Challenges of Collecting LiDAR Data From a Growing Autonomous Vehicle Fleet: Implications for Infrastructure Planning and Inspection Practices
    Mekker, Michelle M ;
    Rahman, Md Ashikur
    2021-03-01 | PDF
    Autonomous vehicles (AVs) that utilize LiDAR (Light Detection and Ranging) and other sensing technologies are becoming more prevalent in the transportation industry. Concurrently, transportation agencies are increasingly challenged with asset management, traffic operations, and safety assessments. The affordability of LiDAR technology continues to ...
  • Effective LongLasting Partial Depth Joint Repairs for Challenging Conditions
    Effective Long-Lasting Partial Depth Joint Repairs for Challenging Conditions
    Olson, Heidi ;
    Tutu, Kenneth
    2021-03-01 | PDF
    As Portland cement concrete (PCC) pavements age, longitudinal and transverse joints can exhibit signs of distress as a result of traffic loading, climatic variations, materials-related issues, and construction defects. Although only small areas are often involved, the joint distress can substantially disrupt traffic flow and increase pavement rough ...
  • Technology Transfer Program 20172020 Technical Brief
    Technology Transfer Program 2017-2020 [Technical Brief]
    Aimen, David
    2021-03-01 | PDF
    The NJDOT Technology Transfer (T2) Program, 2017-2020 focused on the development and implementation of a program to increase the level of awareness concerning transportation-related issues within New Jersey, promote an ongoing exchange of ideas, translate the latest state-of-the-art trends and technology practices, showcase innovation, and promote ...
  • KSU S4M Settlement Stabilization Through Structural Strengthening and Monitoring of KDOT Bridge 059045 Shawnee Drive Over I135
    KSU S4M: Settlement Stabilization Through Structural Strengthening and Monitoring of KDOT Bridge 059–045 Shawnee Drive Over I-135
    Halim, Abdul Halim ;
    Rasheed, Hayder A.
    2021-03-01 | PDF
    The Bridge 059-045 at Shawnee Drive over I-135 is a reinforced concrete box girder structure constructed in 1965 to connect the rural Shawnee Drive across the Interstate I-135 near McPherson, KS, in between Salina and Wichita. The bridge was observed during annual inspection in 1998 to have experienced some settlement due to its proximity to a sink ...
  • Assessment of a Displaced Pedestrian Crossing for Multilane Arterials
    Assessment of a Displaced Pedestrian Crossing for Multilane Arterials
    Nafakh, Abdullah Jalal ;
    Zhang, Yunchang
    2021-03-01 | PDF
    This research explores the benefits of a pedestrian crosswalk that is physically displaced from the intersection, using simulation software to estimate the benefits in terms of delay and pedestrian travel time. In many cases, the displaced pedestrian crossing may provide benefits such as reduced vehicle delay, reduced crossing distance, increased o ...
  • Large Box Study on Granular Base Options for Portland Cement Concrete Pavements
    Large Box Study on Granular Base Options for Portland Cement Concrete Pavements
    Walkenbach, Tanya N. ;
    Han, Jie
    2021-03-01 | PDF
    With the depletion of natural resources and limited funding for necessary pavement construction and rehabilitation, recycled concrete aggregate (RCA) and reclaimed asphalt pavement (RAP) are potential alternatives to the virgin granular base (VGB) typically used. The addition of geosynthetics at the interface of base course and subgrade can stabili ...
  • Use of Recycled Asphalt
    Use of Recycled Asphalt
    Ncube, Ayanda Thembeka ;
    Bobet, Antonio
    2021-03-01 | PDF
    The term Reclaimed Asphalt Pavement (RAP) is used to designate a material obtained from the removal of pavement materials. RAP is used across the US in multiple applications, largely on asphalt pavement layers. RAP can be described as a uniform granular non-plastic material, with a very low percentage of fines. It is formed by aggregate coated with ...
  • Last Mile Delivery and Route Planning for Freight
    Last Mile Delivery and Route Planning for Freight
    Iyer, Ananth V ;
    Gkritza, Konstantina
    2021-03-01 | PDF
    This report analyzes anticipated last mile challenges in Indiana by using a scenario-based approach to develop forecasts of GDP growth and thus freight growth across industry clusters in Indiana counties; potential congestion implied by this growth; and a proactive plan to add capacity to alleviate the congestion. We use a quantitative approach to ...
  • Evaluation of Counting Device for Pedestrians and Bicyclists
    Evaluation of Counting Device for Pedestrians and Bicyclists
    Ismail, Yasser
    2021-03-01 | PDF
    This study evaluates the automatic counting feature of two sensors to count pedestrians and bicyclists. The first sensor (sensor A) is a hardware/software system that is used to detect, classify, and count different objects. It is composed of two components: the sensor (hardware) and the software (the data platform). All the components of sensor A ...
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