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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 7061 - 7080 of 36104 results
  • Control and Management of Urban Traffic Networks With Mixed Autonomy
    Control and Management of Urban Traffic Networks With Mixed Autonomy
    Pedarsani, Ramtin
    2018-03-13 | PDF
    Automobiles are increasingly equipped with autonomous and semi-autonomous technologies such as adaptive cruise control and automated lane-keeping. It is apparent that increasing numbers of these smart vehicles will have a dramatic impact on network-level mobility factors such as traffic congestion and travel times. By enabling platooning of groups ...
  • Evaluating the Effect of Google Glass on Driver Distraction
    Evaluating the Effect of Google Glass on Driver Distraction
    Fisher, Donald L. ;
    Knodler, Michael A.
    2018-03-12 | PDF
    The number of drivers aged 65 or older has been increasing rapidly over the last ten years. There were more than 40 million elderly drivers in United States, which is a 50% increase from 1999. While there is an increase in mobility and independence associated with driving, the high risk of being injured or killed in a motor vehicle accident involvi ...
  • Assessment of Road Deicing Impacts to Roadside Pines in the Black Hills
    Assessment of Road Deicing Impacts to Roadside Pines in the Black Hills
    Ball, John ;
    Malo, Douglas
    2018-03-07 | PDF
    During the early to mid-2000s the public expressed concern regarding the poor appearance of the ponderosa pines (Pinus ponderosa) along highways in the Black Hills. Deicing road salts were thought to be the cause for the change in appearance. The objectives of this study were to define the extent of discoloration and dieback of pines along the stat ...
  • Development of Secondary Route Bridge Design Plan Guides
    Development of Secondary Route Bridge Design Plan Guides
    Eamon, Christopher D. ;
    Darwish, Ihab
    2018-03-03 | PDF
    The objective of this study is to develop a set of bridge plan guides for low-volume traffic roads. The purpose of the plans is to facilitate construction of new structures suitable for local agencies. The designs are to specifically address common local agency road, span, and site conditions. A series of initial bridge design concepts were first i ...
    Supporting Files
  • Traffic Control Device Evaluation Program FY 2017
    Traffic Control Device Evaluation Program : FY 2017
    Finley, Melisa D. (Melisa Dayle) ;
    Chrysler, Susan T.
    2018-03-01 | PDF
    This report presents findings on the activities conducted in the Traffic Control Device Evaluation Program during the 2017 fiscal year. The research on sponsored changeable message signs (continued from the previous year) was terminated by the Federal Highway Administration. Also continued from the previous year, the update for determining time req ...
  • Durability Evaluation of Ternary Mix Designs for Extremely Aggressive Exposures
    Durability Evaluation of Ternary Mix Designs for Extremely Aggressive Exposures
    Riding, Kyle A ;
    Ferraro, Christopher C.
    2018-03-01 | PDF
    Concrete mixtures can be made to be durable, even in extremely aggressive environments common in Florida. Deterioration is often caused by water and ion ingress into concrete through the concrete pore network. The resistance to water and ion movement into concrete, or penetrability, is measured by direct and indirect measures of the concrete pore s ...
    Supporting Files
  • MASH Test No 310 of a NonProprietary HighTension Cable Median Barrier for Use in 6H1V VDitch Test No MWP9
    MASH Test No. 3-10 of a Non-Proprietary, High-Tension, Cable Median Barrier for Use in 6H:1V V-Ditch (Test No. MWP-9)
    Pajouh, Mojdeh Asadollahi ;
    Lechtenberg, Karla A.
    2018-03-01 | PDF
    The Midwest Pooled Fund Program has been developing a prototype design for a non-proprietary, high-tension, cable median barrier for use in a 6H:1V median V-ditch. This system incorporates four evenly spaced cables, Midwest Weak Posts (MWPs) spaced at 8 to 16 ft (2.4 to 4.9 m) intervals, and a bolted, tabbed bracket to attach the cables to each pos ...
  • A North American Survey of Electric Bicycle Owners
    A North American Survey of Electric Bicycle Owners
    MacArthur, John ;
    Cherry, Christopher R.
    2018-03-01 | PDF
    Electric bicycle (e-bike) use is a rising phenomenon in North America as a growing number of manufacturers produce a variety of bicycles which can accommodate the needs of diverse populations. With the growth of the e-bike industry, e-bike users are an increasingly integral part of both the transportation network and recreational trail system. Howe ...
  • Developing Markets for ZeroEmission Vehicles in Goods Movement
    Developing Markets for Zero-Emission Vehicles in Goods Movement
    Giuliano, Genevieve ;
    White, Lee
    2018-03-01 | PDF
    This report evaluates the market status and potential freight market penetration of zeroemission vehicles (ZEVs) and near ZEVs in the medium and heavy duty class within theCalifornia market. It evaluates alternative technologies, primarily battery electric, fuel cell, and hybrid technologies, and compares them to existing gasoline, diesel, and natu ...
  • Assessment of Mobility and Transit Access to Captive Riders in Suburban and Rural Areas
    Assessment of Mobility and Transit Access to Captive Riders in Suburban and Rural Areas
    Mishra, Sabya ;
    Cherry, Christopher R.
    2018-03-01 | PDF
    This project addresses mobility and transit access in urban and rural areas. For urban areas, we identify the challenge to the provision of equitable access is quantifying equity-oriented metrics for public transit service, and utilize an approach that relies on available transit network characteristics and spatial demographic data to quantify mult ...
  • A Field and Simulator Evaluation of AllRed Clearance Intervals for Use in LeftTurn Applications
    A Field and Simulator Evaluation of All-Red Clearance Intervals for Use in Left-Turn Applications
    Knodler, Michael A. ;
    Santiago-Chaparro, Kelvin R.
    2018-03-01 | PDF
    As the implementation of the novel flashing yellow arrow (FYA) traffic control device advances throughout the country, agencies continually seek ways to improve intersection operations and safety, especially on left turns. For example, permissive left-turn intervals have been communicated to drivers using several traffic signal indications; however ...
  • Adapting a Culture for Performance Management at the Nevada Department of Transportation
    Adapting a Culture for Performance Management at the Nevada Department of Transportation
    Duncan, Gregory M. ;
    Mugabe, Kundayi
    2018-03-01 | PDF
    State transportation agencies (STAs) nationwide have grown accustomed to using performance management to demonstrate transparency and accountability to the public, state general assemblies, and national stakeholders. The Nevada Department of Transportation (NDOT) has identified cultural acceptance of performance management as a systemic weakness in ...
  • DRIVING DISTRACTION DUE TO DRONES
    DRIVING DISTRACTION DUE TO DRONES
    Hurwitz, David S. ;
    Olsen, Michael J.
    2018-03-01 | PDF
    Drones are an emerging technology with various potential commercial and recreational uses. Based on the current literature and existing regulations related to drone operations, there are gaps in knowledge related to the potential safety concerns of drone operations near roadway infrastructures. A randomized, partially counterbalanced factorial expe ...
  • The Adoption of Shared Mobility in California and Its Relationship with Other Components of Travel Behavior
    The Adoption of Shared Mobility in California and Its Relationship with Other Components of Travel Behavior
    Circella, Giovanni ;
    Alemi, Farzad
    2018-03-01 | PDF
    Emerging technologies and shared mobility services are quickly changing transportation. The popularity of these services is particularly high among millennials and those living in the dense central parts of cities. Still, the reasons behind the adoption of these services and their impacts on the use of other transportation modes and on total travel ...
  • Commuter Bus Demand Incentives for Modal Shift and Impact on GHG Emissions
    Commuter Bus Demand, Incentives for Modal Shift, and Impact on GHG Emissions
    Christofa, Eleni ;
    Gonzales, Eric J.
    2018-03-01 | PDF
    In response to Governor Charles Baker’s Executive Order No. 569, MassDOT Rail and Transit Division is interested in identifying ways to reduce greenhouse gas (GHG) emissions from the transportation sector by incentivizing mode shift through the provision of improved transit service. This project focuses on determining whether there is an opportunit ...
  • Evaluation and Performance of HDPE Pipes Under CDOT Highways TRex and Other Locations
    Evaluation and Performance of HDPE Pipes Under CDOT Highways, T-Rex and Other Locations
    Molinas, Albert ;
    Mommandi, Amanullah
    2018-03-01 | PDF
    HDPE pipes used in CDOT drainage systems are expected to have a 50-year design life. During the T-Rex project in 2003 a number of HDPE pipes were installed with shallow cover. Later, the majority of these pipes had to be removed and replaced after they were damaged by construction equipment driving over installed pipes, and excavations occurring ne ...
    Supporting Files
  • Paving the Way for Autonomous and Connected Vehicle Technologies in the Motor Carrier Industry
    Paving the Way for Autonomous and Connected Vehicle Technologies in the Motor Carrier Industry
    Bernard Bracy, Jill M ;
    Bao, Ken
    2018-03-01 | PDF
    This study provides potential safety considerations and infrastructure needs that will support the mass adoption of autonomous vehicle (AV) and connected vehicle (CV) technologies in the motor carrier industry. Using large truck crash data from 2013 through 2015 obtained from the Missouri State Highway Patrol, chi-square automatic interaction detec ...
  • Assessment of Alternative Sinusoidal Rumble Stripe Construction
    Assessment of Alternative Sinusoidal Rumble Stripe Construction
    Mathew, Jijo ;
    Balmos, Andrew
    2018-03-01 | PDF
    Studies have shown that rumble strips installed on a roadway significantly reduce the number of accidents caused by lane departures. However, when a vehicle engages the strips, a loud exterior noise is generated in addition to the alerting in-cabin noise. The extraneous exterior noise can travel at least several hundred feet at a volume which is co ...
  • Use of Lightweight Sand for Internal Curing to Improve Performance of Concrete Infrastructure
    Use of Lightweight Sand for Internal Curing to Improve Performance of Concrete Infrastructure
    Khayat, Kamal H. ;
    Meng, Weina
    2018-03-01 | PDF
    The project presented in this report aimed to develop an effective methodology to use saturated lightweight sand (LWS) for internal curing to enhance concrete performance and prolong service life of concrete structures. High-performance concrete (HPC) mixtures approved by MoDOT for pavement and bridge deck structures were used for the baseline mixt ...
  • High Impact Prioritization of Bikeshare Program Investment to Improve Underserved Communities Access to Jobs and Essential Services
    High Impact Prioritization of Bikeshare Program Investment to Improve Underserved Communities’ Access to Jobs and Essential Services
    Niemeier, Debbie ;
    Qian, Xiaodong
    2018-03-01 | PDF
    Bikeshare programs are increasingly popular in the United States, and they are an important part of sustainable transportation systems. They offer an important alternative mode choice for many types of last mile trips. Most of the current research on bikeshare focuses on bikeshare benefits (e.g., how to replace auto trips with bike trips and reduce ...
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