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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 5281 - 5300 of 36022 results
  • A Study to Determine if the Biofuel Crop Camelina is a Wildlife Attractant Phase I and partial Phase II
    A Study to Determine if the Biofuel Crop Camelina is a Wildlife Attractant (Phase I and partial Phase II)
    Chinn, Mari S ;
    Godfrey III, Edward E
    2019-10-02 | PDF
    Airport managers have significant annual operating costs tied to maintaining airport green space that can often exceed hundreds of acres and often face challenges with high fuels costs to operate ground vehicles. This project was initiated to explore modifying the land use around airports to support the production of oilseeds and other biomass crop ...
  • The Impact of Emerging Technologies and Trends on Travel Demand in Georgia
    The Impact of Emerging Technologies and Trends on Travel Demand in Georgia
    Kim, Sung Hoo ;
    Mokhtarian, Patricia L.
    2019-10-01 | PDF
    This study aims to enhance understanding of the impact of new and emerging technologies on travel behavior/demand for the state of Georgia, and, thus, potentially contribute to improving transportation planning and demand forecasting for Georgia residents. In this project, the research team designed and implemented a wide-ranging travel survey that ...
  • Investigating Safety Impact of Center Line Rumble Strips Lane Conversion Roundabout and JTurn Features on Louisiana Highways
    Investigating Safety Impact of Center Line Rumble Strips, Lane Conversion, Roundabout, and J-Turn Features on Louisiana Highways
    Sun, Xiaoduan ;
    Rahman, M Ashifur
    2019-10-01 | PDF
    Over the past several years, Louisiana has installed quite a few relatively new crash countermeasures, such as center line rumble strips (CLRS) on rural two-lane highways, restriping four-lane undivided roadways to three-lane or five-lane roadways with center lane for left turns, restricting median openings on high speed corridors (RCUT), and round ...
  • Informing a Pilot Preparing the PreLaunch Survey for the Davis Amtrak Station Access Program
    Informing a Pilot: Preparing the Pre-Launch Survey for the Davis Amtrak Station Access Program
    Pike, Susan ;
    Kothawala, Alimurtaza
    2019-10-01 | PDF
    This study investigates barriers to accessing the Davis Amtrak Station and will inform a pilot program to increase access to the station with on-demand alternatives. The program aims to decrease private vehicle use to access the station and for travel to locations outside of Davis. Currently, the Davis station has the third highest passenger usage ...
  • Access Management Best Practices
    Access Management Best Practices
    Kirk, Adam ;
    Van Dyke, Chris
    2019-10-01 | PDF
    Research has persistently demonstrated that adopting a systematic access management framework improves highway operations and bolsters safety. Many state transportation agencies have adopted formal access management programs to systematize the application of access management techniques, however, the Kentucky Transportation Cabinet (KYTC) been unab ...
  • Concrete Bridge Deck Performance Data and Metrics for the State of Oregon
    Concrete Bridge Deck Performance Data and Metrics for the State of Oregon
    Wettach-Glosser, Jael ;
    Schumacher, Thomas
    2019-10-01 | PDF
    This report reviews the research on data and metrics related to concrete bridge deck performance for the state of Oregon. With guidance from the literature and ODOT personnel, two datasets were created with data currently available through ODOT and the NBI to evaluate concrete bridge deck performance. Using these datasets, a survival analysis was p ...
  • Connected Vehicle Corridor Deployment and Performance Measures for Assessment
    Connected Vehicle Corridor Deployment and Performance Measures for Assessment
    Li, Howell ;
    Mathew, Jijo K
    2019-10-01 | PDF
    In November 2016, the American Association of State Highway and Transportation Officials (AASHTO) announced the Signal Phase and Timing (SPaT) challenge to state and local agencies to kick start infrastructure deployments for V2I communications. The challenge involved the deployment of Dedicated Short Range Communication (DSRC) infrastructure with ...
  • CalibrationDevelopment of Safety Performance Functions for New Jersey
    Calibration/Development of Safety Performance Functions for New Jersey
    Ozbay, Kaan ;
    Nassif, Hani
    2019-10-01 | PDF
    Safety Performance Functions (SPFs) in the Highway Safety Manual (HSM) were developed using historic crash data collected in different states. Because local state or geographic conditions vary, to make the SPFs better accommodate the local data, two strategies are usually undertaken: the first strategy is to calibrate SPFs provided in HSM so that t ...
  • Commuter Bus Demand Incentives for Modal Shift and Impact on Greenhouse Gas Emissions Part II Service Delivery Concepts
    Commuter Bus Demand, Incentives for Modal Shift, and Impact on Greenhouse Gas Emissions: Part II – Service Delivery Concepts
    Gonzales, Eric J. ;
    Christofa, Eleni
    2019-10-01 | PDF
    This report is a continuation of a project to model and evaluate the potential to reduce greenhouse gas (GHG) emissions by expanding express commuter bus services in the Greater Boston area. First, data for socioeconomic factors in the Central Transportation Planning Staff (CTPS) travel demand model are collected to improve model accuracy. Second, ...
  • Rail Track Asset Management and Risk Management
    Rail Track Asset Management and Risk Management
    Zhang, Zhipeng ;
    Oladipo, Olufemi
    2019-10-01 | PDF
    The United States has the most extensive rail network in the world. Freight rail carries over 43% of ton-miles of goods and passenger rail transports millions of passengers annually. Track infrastructure is the most valuable asset to the rail industry. Also, track infrastructure quality is critical for rail safety and risk management. Despite billi ...
  • Traveler Information for the Commercial Vehicle Operations Community
    Traveler Information for the Commercial Vehicle Operations Community
    Flintsch, Alejandra Medina ;
    Li, Yingfeng (Eric)
    2019-10-01 | PDF
    Traveler information is critical for the safety and efficiency of commercial vehicle operations (CVO). The objectives of this project are to (a) review traveler information technologies and practices in Virginia, (b) understand CVO community information needs, (c) document data availability to support a CVO information system, and (d) recommend a f ...
  • FAA Center of Excellence Alternative Jet Fuels Environment Annual Technical Report 2019 For the Period October 1 2018 September 30 2019
    FAA Center of Excellence Alternative Jet Fuels & Environment: Annual Technical Report 2019: For the Period October 1, 2018 - September 30, 2019
    ASCENT Aviation Sustainability Center
    2019-10-01 | PDF
    This report covers the period October 1, 2018 through September 30, 2019. 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 held virtually March 31 - April 1, 2020. Over the last year, the ASCEN ...
  • Development of Automated Incident Detection System Using Existing ATMS CCTV
    Development of Automated Incident Detection System Using Existing ATMS CCTV
    Chen, Stanley ;
    Chen, Yaobin
    2019-10-01 | PDF
    Indiana Department of Transportation (INDOT) has over 300 digital cameras along highways in populated areas in Indiana. These cameras are used to monitor traffic conditions around the clock, all year round. Currently, the videos from these cameras are observed by human operators. The main objective of this research is to develop an automatic real-t ...
  • Freight Flows and Incident Management
    Freight Flows and Incident Management
    Khattak, Asad ;
    Li, Xiaobing
    2019-10-01 | PDF
    This study models and simulates vehicle behaviors based on large-scale traffic-incident congestion and the availability of Advanced Traveler Information Systems (ATIS). The study examines how well detours can help truck and passenger vehicle drivers avoid unexpected congestion and associated delay costs. En-route diversions could also decrease seco ...
  • RiskandReliabilityBased Approaches to Analyzing Road Geometric Design Criteria
    Risk-and-Reliability-Based Approaches to Analyzing Road Geometric Design Criteria
    Porter, Richard J. ;
    Musunuru, Anusha
    2019-10-01 | PDF
    Federal and state transportation agencies set goals related to surface transportation system performance. The variability in factors influencing design criteria (e.g., driver performance, road conditions, and vehicle performance) is often large and is addressed implicitly by using “conservative” values. However, a risk-and-reliability-based analysi ...
  • Deep Soil Test Borings to Determine Shear Wave Velocities Across South Carolina
    Deep Soil Test Borings to Determine Shear Wave Velocities Across South Carolina
    Sasanakul, Inthuorn ;
    Gassman, Sarah
    2019-10-01 | PDF
    Having an accurate shear wave velocity profile and a better understanding of dynamic behavior of the deep soil deposits in the South Carolina Coastal Plain are critical for seismic hazard analyses of critical transportation infrastructure. This research presents a study that obtained comprehensive field and laboratory measurements of shear wave vel ...
  • Incorporating Potential Climate Change Impacts in Bridge and Culvert Design
    Incorporating Potential Climate Change Impacts in Bridge and Culvert Design
    Morsy, Mohamed M. ;
    Shen, Yawen
    2019-10-01 | PDF
    This project examined the potential impact of changing climatic conditions on structural designs in Virginia. A methodology was developed for producing intensity-duration-frequency (IDF) curves verified against the standard Atlas 14 values. The results suggest increases in rainfall depth for a 24-hour rainfall event. The second objective used a 2-d ...
  • 2018 Assessment of the Practice of Public Involvement in Florida Summary
    2018 Assessment of the Practice of Public Involvement in Florida [Summary]
    Kramer, Jeff
    2019-10-01 | PDF
    University of South Florida researchers documented the state of practice of public involvement in transportation decision-making and provided an update to the 2006 report documenting public involvement in Florida.
  • Experimental and Computational Investigations of HighDensity Asphalt Mixtures
    Experimental and Computational Investigations of High-Density Asphalt Mixtures
    Marasteanu, Mihai O. ;
    Le, Jia-Liang
    2019-10-01 | PDF
    Compaction of asphalt mixtures represents a critical step in the construction process that significantly affects the performance and durability of asphalt pavements. In this research effort, the compaction process of asphalt mixtures was investigated using a combined experimental and computational approach. The primary goal was to understand the ma ...
  • Evaluation of Self Consolidating Concrete and Class IV Concrete Flow in Drilled Shafts
    Evaluation of Self Consolidating Concrete and Class IV Concrete Flow in Drilled Shafts
    Mullins, Gray ;
    Zayed, Abla
    2019-10-01 | PDF
    The term “mattressing” is a relatively new term coined by a joint task force formed by the Deep Foundation Institute and European Foundation Federation Committee (DFI/EFFC). Mattressing is defined as a pattern of creases on the surface of drilled shafts or slurry walls where the pattern reflects the reinforcing cage layout and which gives the appea ...
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