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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 6481 - 6500 of 36101 results
  • Elastomeric Concrete Plug Joints A New Durable Bridge Expansion Joint Design
    Elastomeric Concrete Plug Joints: A New Durable Bridge Expansion Joint Design
    Balakumaran, Soundar S G ;
    O'Neill, Kevin
    2018-10-01 | PDF
    Expansion joints are important components of bridges that accommodate the movements between deck spans that result from thermal loads, traffic loads, and other environmental factors. Experience shows that joints undergo premature deterioration on a regular basis, thus leading to unexpected problems caused by leakage of water and other corrosive che ...
  • Evaluation of Geosynthetics Reinforcement in Flexible Pavement Structures Using Accelerated Pavement Testing
    Evaluation of Geosynthetics Reinforcement in Flexible Pavement Structures Using Accelerated Pavement Testing
    Huang, Baoshan ;
    Gong, Hongren
    2018-10-01 | PDF
    This project investigated the reinforcement performance of different types of geosynthetics placed at two locations of the aggregate base through a series of well-controlled accelerated pavement testing. To attain the target of accelerating the tests in a relatively short time period, a weak soil with a CBR value of 3 (%) was used to construct the ...
  • Examination of a Prototype Camera Monitor System for Light Vehicle Outside Mirror Replacement
    Examination of a Prototype Camera Monitor System for Light Vehicle Outside Mirror Replacement
    Mazzae, Elizabeth N. ;
    Baldwin, G.H. Scott
    2018-10-01 | PDF
    This report describes the examination of a prototype side camera monitor system (CMS) used in lieu of outside rearview mirrors on a light vehicle to learn about the technology and related issues as NHTSA considers whether to revise FMVSS No. 111 to permit such technologies as an alternative compliance option. A 2016 Audi A4 equipped with a prototyp ...
  • PreCrash Interactions between Pedestrians and Cyclists and Intelligent Vehicles
    Pre-Crash Interactions between Pedestrians and Cyclists and Intelligent Vehicles
    Chen, Yaobin
    2018-09-30 | PDF
    In this paper we identified the most important bicyclist crash scenarios for crash imminent braking systems. Our tested scenario involved a crash geometry that is responsible for approximately a quarter of cyclist social cost and a third of cyclist fatalities in single light vehicle crashes. Its primary contribution is that it is based on actual te ...
  • Cognitive Attention Models for Driver Engagement in Intelligent and Semiautonomous Vehicles
    Cognitive Attention Models for Driver Engagement in Intelligent and Semi-autonomous Vehicles
    Lee, John D. ;
    Fisher, Donald
    2018-09-30 | PDF
    The focus of this project is to improve the state-of-the-art in human cognitive modeling in order to more accurately describe the human-machine interfaces that take place in the pre-crash scenarios. This project develops a cognitive attention model that provides a fundamental understanding and analysis capability for driver attention. In particular ...
  • MobilityAware Integrated Urban Design
    Mobility-Aware Integrated Urban Design
    Dogan, Timur ;
    Samaranayake, Samitha
    2018-09-30 | PDF
    Rapid urbanization, with new construction estimated to be 250 times NYC by 2050, is increasing traffic congestion, pollution and related health threats. This is a worrisome development but also a unique opportunity to improve urban mobility and quality of life. Understanding consequences of urban design choices on mobility, sustainability, and heal ...
  • Repair of Reinforced Concrete Bridge Columns via Plastic Hinge Relocation Project Volume 1 Repair Using Conventional Materials
    Repair of Reinforced Concrete Bridge Columns via Plastic Hinge Relocation Project: Volume 1: Repair Using Conventional Materials
    Krish, Zachary F. ;
    Kowalsky, Mervyn J.
    2018-09-30 | PDF
    Presented in this report is research aimed at challenging the assumption that severely damaged reinforced concrete bridge columns are not easily repaired. An experimental program was conducted in which six large scale bridge columns exhibiting buckled and fractured reinforcement were repaired using plastic hinge relocation and conventional material ...
  • Repair of Reinforced Concrete Bridge Columns via Plastic Hinge Relocation Volume 2 Repair Using CFRP Materials
    Repair of Reinforced Concrete Bridge Columns via Plastic Hinge Relocation: Volume 2: Repair Using CFRP Materials
    Tasdemir, Emrah ;
    Seracino, Rudolf
    2018-09-30 | PDF
    The goal of this report is to present a repair procedure for seismically damage reinforced concrete bridge columns via plastic hinge relocation. To repair the damaged columns, CF anchors were utilized. Thus, the behavior of CF anchors was studied through various testing method and design procedures were developed. In addition, the reliability of pr ...
  • Driver Models for Both Human and Autonomous Vehicles
    Driver Models for Both Human and Autonomous Vehicles
    Kurt, Arda ;
    Ozguner, Umit
    2018-09-30 | PDF
    The goal of this project was to understand how multi-agent models of the driver and vehicle can inform design principles for optimized autonomous vehicle systems. In this project, a computational model for human behavior in pre-crash scenarios was developed and investigated. A multi-agent model with both human drivers and autonomous and semi-autono ...
  • Implementation of Laser Scanning System for Classification of Aggregate Texture Project Summary
    Implementation of Laser Scanning System for Classification of Aggregate Texture [Project Summary]
    Arámbula-Mercado, Edith ;
    Fernando, Emmanuel
    2018-09-30 | PDF
    The lack of pavement friction causes vehicles to skid and run off the road (ROR). In 2016, single-vehicle ROR crashes resulted in 1,293 deaths on Texas highways. The Texas Department of Transportation (TxDOT) Highway Safety Improvement Program evaluated the cost of one roadway fatality or one incapacitating injury at approximately $3.3 million. If ...
  • Evaluation and Prediction of Bridge Pier and Contraction Scour of Cohesive River Sediments in Tennessee
    Evaluation and Prediction of Bridge Pier and Contraction Scour of Cohesive River Sediments in Tennessee
    Schwartz, John S ;
    Palomino, Angel M
    2018-09-30 | PDF
    Approximately 450 scour critical bridges are maintained by Tennessee Department of Transportation (TDOT)across the state. Many of these bridges are located in river or stream beds and banks where cohesive soils are prevalent, particularly in western Tennessee. In the Hydraulic Engineering Circular No. 18 by the Federal Highway Administration, Evalu ...
  • Technology and Enhancements to Improve PreCrash Safety
    Technology and Enhancements to Improve Pre-Crash Safety
    Ozguner, Umit ;
    Chen, Yaobin
    2018-09-30 | PDF
    This project was a combination of multiple smaller, short-term sub-projects under the general theme of “Technology and Enhancements to Improve Pre-Crash Safety”. It focuses on technology improvements that can be implemented in intelligent and autonomous vehicles toward the goal of improving pre-crash safety. Projects include: (1) Electroencephalogr ...
  • Repair of Reinforced Concrete Bridge Columns via Plastic Hinge Relocation Volume 3 Design Guide
    Repair of Reinforced Concrete Bridge Columns via Plastic Hinge Relocation: Volume 3: Design Guide
    Krish, Zachary F. ;
    Kowalsky, Mervyn J.
    2018-09-30 | PDF
    This document is meant to act as a standalone design guide for implementation of the plastic hinge relocation repair method for reinforced concrete bridge columns presented in Volume I of this report.
  • Bioinjury Implications of Precrash Safety Modeling and Intervention Investigators
    Bioinjury Implications of Pre-crash Safety Modeling and Intervention Investigators
    Bolte, John ;
    Weisenberger, Janet
    2018-09-30 | PDF
    Boundary conditions for three crash scenarios were chosen to isolate common, yet relatively straight-forward crash physics. A population-based database (National Automotive Sampling System – Crashworthiness Data System (NASS-CDS)) and a real-world crash database (Crash Injury Research Engineering Network (CIREN)) were chosen as data sources. This s ...
  • FAA Center of Excellence for Alternative Jet Fuels Environment Annual Technical Report For the Period October 1 2017 September 30 2018
    FAA Center of Excellence for Alternative Jet Fuels & Environment: Annual Technical Report: For the Period October 1, 2017 – September 30, 2018
    ASCENT Aviation Sustainability Center
    2018-09-30 | PDF
    This report covers the period October 1, 2017 through September 30, 2018. The Center was established by the authority of FAA solicitation 13-C-AJFE-Solicitation. During that time the ASCENT team launched a new website, which can be viewed at ascent.aero. The next meeting will be hosted by the Georgia Institute of Technology, April 18-19, 2019 in At ...
  • Pavement Condition Study
    Pavement Condition Study
    Lawson, Steve
    2018-09-28 | PDF
    The purpose of this study is to gather feedback from the traveling public on the performance measures and targets that are used to guide decisions by the Vermont Agency of Transportation (VTrans) on the investment, timing and location of roadway paving projects. This study utilized an original smartphone app (programmed for both iPhones and Android ...
  • MDOT Statewide Multimodal Prioritization Selection Study
    MDOT Statewide Multimodal Prioritization & Selection Study
    Jones, Frederick ;
    Kuechenmeister, Anne
    2018-09-27 | PDF
    This study seeks to enhance Mississippi Department of Transportation's (MDOT’s) multimodal project selection process by developing a set of scalable and implementable project selection criteria and improved prioritization methodologies to assist the agency with continuous improvement of their Multimodal Transportation Improvement Program. The imple ...
  • Field Experiment of Variable Speed Advisory VSA
    Field Experiment of Variable Speed Advisory (VSA)
    Lu, Xiao-Yun ;
    Spring, John
    2018-09-25 | PDF
    This report documents the field test of Variable Speed Advisory (VSA) which is an Active Traffic Management strategy. The test site for the VSA is on State Route 78 Eastbound (SR-78E) from Vista Village Drive (in the City of Vista) to the freeway interchange point of SR-78E and U.S. Route 15 (in the city of Escondido). This test segment is a three- ...
  • Update and Documentation of MDOT Warranty Process and Distress Thresholds
    Update and Documentation of MDOT Warranty Process and Distress Thresholds
    Wang, Feng ;
    Amini, Farshad
    2018-09-20 | PDF
    Pavement warranty is an innovative contracting procedure, which has been adopted in Mississippi to enhance pavement performance and protect the investment in pavement construction since 2000. MDOT uses converted deduct points to monitor/evaluate the distresses and the distress thresholds are in the form of deduct points, which are not as straightfo ...
  • MASH 2016 Evaluation of a Nonproprietary Type III Barricade
    MASH 2016 Evaluation of a Non-proprietary Type III Barricade
    Schmidt, Jennifer D. ;
    Langel, Tyler J
    2018-09-19 | PDF
    Several work-zone traffic control devices have not yet been evaluated to the American Association of State Highway and Transportation Officials’ (AASHTO’s) Manual for Assessing Safety Hardware, Second Edition (MASH 2016) safety performance criteria. Devices commonly used by Smart Work Zone Deployment Initiative state sponsors were summarized. A non ...
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