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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 4641 - 4660 of 36908 results
  • Evaluating Effectiveness of Crash Type SPFs in Safety Management Comparing the Effectiveness of Network Screening and Diagnostic Methods Using Aggregate SPFs and Test of Proportion With Crash Type SPFs
    Evaluating Effectiveness of Crash Type SPFs in Safety Management: Comparing the Effectiveness of Network Screening and Diagnostic Methods Using Aggregate SPFs and Test of Proportion With Crash Type SPFs
    Kononov, Jake ;
    Williams, Jim
    2020-10-01 | PDF
    The intent of this project is to compare the effectiveness of network screening and diagnostic methods using aggregate SPFs and Test of Proportions with crash type SPFs. Both methods were applied to the same datasets containing crash history and exposure data. Sixteen (16) frequency and severity Colorado-specific crash type SPFs were developed for ...
  • Reduce Pedestrian Fatal Crashes in Louisiana by Improving Lighting Conditions Research Project Capsule 192SA
    Reduce Pedestrian Fatal Crashes in Louisiana by Improving Lighting Conditions: Research Project Capsule [19-2SA]
    Thapa, Raju ;
    Rupnow, Tyson
    2020-10-01 | PDF
    The primary objective of this study is to investigate the impact of lighting conditions on pedestrian crashes. The major objectives are learning and documenting lighting policies, guidelines, and practices in Louisiana as well as other states. Emphasis will be given to street lighting policies with a focus on pedestrians. Secondly, lighting conditi ...
  • LED Snowplow Lights Evaluation Report
    LED Snowplow Lights – Evaluation Report
    Fogg, Daniel J ;
    Evans, Lane W
    2020-10-01 | PDF
    The New Hampshire Department of Transportation (NHDOT) snowplow fleet currently uses halogen lights mounted on the push frame for night time snowplowing operations. Due to the excessive vibration, frequent bulb replacement is necessary. Light-emitting diodes (LEDs) are less susceptible to vibrations and could reduce long term maintenance cost. Plow ...
  • Reducing Flood Vulnerability of Communities with Limited Road Access by Optimizing Bridge Elevation
    Reducing Flood Vulnerability of Communities with Limited Road Access by Optimizing Bridge Elevation
    Turner, David ;
    van de Lindt, John W.
    2020-10-01 | PDF
    On September 11-17, 2013, Colorado suffered devastating and widespread flash flooding over 150 miles from Colorado Springs north to Fort Collins, impacting 24 counties. The flood damaged several bridges and over 400 miles of state roads. As a result of the transportation damage, residents of Drake, Colorado, were isolated and had to be evacuated vi ...
  • Proper Overlay Type and Designs for PCC Pavement
    Proper Overlay Type and Designs for PCC Pavement
    Choi, Pangil ;
    Won, Hoonill
    2020-10-01 | PDF
    As of 2016, TxDOT managed a total of 16,327 lane miles of Portland cement concrete (PCC) pavement, which represents an important asset to TxDOT. As PCC pavements in Texas built in the 1960s through 1980s have already exceeded or are approaching the end of their design lives, many of these projects will require some form of rehabilitation. Consideri ...
  • Guides for System To Render ME Traffic Data for Pavement Design Student Guide
    Guides for System To Render M-E Traffic Data for Pavement Design: Student Guide
    Walubita, Lubinda F. ;
    Lee, Sang Ick
    2020-10-01 | PDF
    This guideline is to demonstrate and provide the key findings of Texas Department of Transportation (TxDOT) Project 0-6940 Develop System to Render Mechanistic-Empirical Traffic Data for Pavement Design. It can be used as a guide for rendering the traffic data required for FPS and mechanistic-empirical (ME) pavement designs for TxDOT engineers. Thi ...
  • The Impacts of Increased Adverse Weather Events on Freight Movement
    The Impacts of Increased Adverse Weather Events on Freight Movement
    Hyun, Kate Kyung ;
    Mattingly, Stephen P.
    2020-10-01 | PDF
    Freight transportation is a major economic backbone of the United States and is vital to sustaining the nation’s economic growth. Ports, as one of the primary components of freight transportation and important means of integrating into the global economic system, have experienced significant growth and increased capacity during the past two decades ...
  • Development of Corrosion Inhibiting Geopolymers Based Cement for Transportation Infrastructure [supporting datasets]
    Castaneda-Lopez, Homero ;
    Radovic, Miladin
    2020-10-01 | PDF
    Geopolymers are gaining attention as affordable, sustainable, and eco-friendly replacement for Ordinary Portland Cement (OPC) in concrete civil structures. More importantly, Geopolymer-based Cement (GPC) provide sustainable and environmentally friendly alternative to OPCs as GPC can be processed at room temperatures from aqueous solutions of waste ...
    Dataset Supporting Files
  • Transportation Performance Management for System Operations Development of Processes Tools Measures and Targets
    Transportation Performance Management for System Operations: Development of Processes, Tools, Measures and Targets
    Amekudzi-Kennedy, Adjo A ;
    Clark, Russell
    2020-10-01 | PDF
    This study identifies effective practices for transportation systems management and operations (TSMO) at the strategic, programmatic and tactical level, assesses Georgia Department of Transportation’s status using the TSMO Capability Maturity Model (CMM), and offers recommendations to move the agency to the next level. The study develops a tool for ...
  • Advanced NonDestructive Bridge Deck Condition Assessment
    Advanced Non-Destructive Bridge Deck Condition Assessment
    Rezvani, Amir
    2020-10-01 | PDF
    Iowa Department of Transportation expressed an interest in commissioning Infratek Solutions Inc. to provide its next-generation bridge deck assessment and analysis services (insight) to Iowa’s selected bridge inventory. To meet this objective, Iowa has initiated a research study with the goal of exploring and refining how advanced NDE assessment te ...
  • Enhancing Evaluation of Wildlife Detection Systems
    Enhancing Evaluation of Wildlife Detection Systems
    Ferenchak, Nicholas N.
    ORCID ICON IMG
    2020-10-01 | PDF
    Every year in the United States, wildlife-vehicle collisions (WVCs) cause 200 human fatalities, 26,000 human injuries, and substantial harm to wildlife populations, resulting in approximately $8.4 billion in total costs. The research team examined two US 64 bridges located near Lumberton, New Mexico that were designed to allow wildlife to cross und ...
  • Quiet Zone Study for Dolton and Riverdale
    Quiet Zone Study for Dolton and Riverdale
    Sriraj, P S ;
    Fazio, Joseph
    2020-10-01 | PDF
    Located in south suburban Cook County, approximately 22 miles (35 km) south of downtown Chicago, the Village of Dolton and Village of Riverdale are investigating options to improve safety at at-grade rail crossings and to minimize the impact of train horn noise throughout their communities. The Federal Railroad Administration (FRA) in 2005 issued Q ...
  • Transit Signal Progression Algorithm for Supporting Redwood Road Transit Signal Priority TSP
    Transit Signal Progression Algorithm for Supporting Redwood Road Transit Signal Priority (TSP)
    Wang, Qinzheng ;
    Yang, Xianfeng (Terry)
    2020-10-01 | PDF
    In 2017, a connected vehicle (CV) corridor utilizing dedicated short-range communication (DSRC) technology was built along Redwood Road in Salt Lake County, Utah. The main purpose of the CV corridor was to implement transit signal priority (TSP) when a bus is running behind its published schedule. The performance data was generated by the transit v ...
  • Motor Vehicle Crashes Among the Older Population
    Motor Vehicle Crashes Among the Older Population
    Qi, Yan ;
    Sarker, Md Al Adib
    2020-10-01 | PDF
    Adults aged 65 or older form a vulnerable population that is susceptible to road traffic injuries. Motor vehicle crashes are among the leading causes of unintentional injury deaths for the older population. There has been an increasing trend in the percentage of fatalities involving older people among the total fatalities. As the older population c ...
  • Influence of Powder Activated Carbon PAC in Fly Ash on the Properties of Concrete
    Influence of Powder Activated Carbon (PAC) in Fly Ash on the Properties of Concrete
    Hossain, Zahid ;
    Roy, Sumon
    2020-10-01 | PDF
    Class C Fly Ash (CFA) is commonly used as supplementary cementitious material (SCM) in producing concrete by ready-mix concrete contractors in Arkansas. However, CFA can be used as a partial replacement of Ordinary Portland Cement (OPC) if it meets certain ASTM requirements. It is believed that the presence of powder activated carbon (PAC) in CFA i ...
  • Influence of Powder Activated Carbon (PAC) in Fly Ash on the Properties of Concrete [supporting datasets]
    Hossain, Zahid ;
    Roy, Sumon
    2020-10-01 | PDF
    Class C Fly Ash (CFA) is commonly used as supplementary cementitious material (SCM) in producing concrete by ready-mix concrete contractors in Arkansas. However, CFA can be used as a partial replacement of Ordinary Portland Cement (OPC) if it meets certain ASTM requirements. It is believed that the presence of powder activated carbon (PAC) in CFA i ...
    Dataset Supporting Files
  • ABQ Streets Project: Creating Alternative Residential Street Designs [supporting datasets]
    Rowangould, Gregory ;
    Ferenchak, Nick
    2020-10-01 | PDF
    This research evaluates opportunities for retrofitting residential streets with alternative designs with the overall goal of improving their function, reducing their negative impacts and reducing maintenance costs. This is accomplished through three main research tasks. First, the authors conduct a comprehensive review of the street design literatu ...
    Dataset Supporting Files
  • Evaluation of Air Quality Models With NearRoad Monitoring Data Technical Report
    Evaluation of Air Quality Models With Near-Road Monitoring Data: Technical Report
    Farzaneh, Reza ;
    Vallamsundar, Suriya
    2020-10-01 | PDF
    Air dispersion models (air quality models) are used in evaluation of transportation projects to ensure their compliance with federal regulations including the National Environmental Policy Act and transportation conformity quantitative hot-spot analysis requirements. The literature indicates a wide range of variabilities involved in the modeling pr ...
  • Investigating the Impacts of Truck Platooning on Transportation Infrastructure in the South-Central Region [supporting datasets]
    Hassan, Hany ;
    Dessouky, Samer
    2020-10-01 | PDF
    Truck platooning is an essential application of connected and autonomous vehicles, where several trucks are connected to each other forming a platoon. It is envisioned that truck platooning can assist in minimizing transportation challenges related to freight movements in the US by improving traffic operation, safety and reducing fuel consumption a ...
    Dataset Supporting Files
  • Roads Prices and Shortages A Gasoline Parable
    Roads, Prices, and Shortages: A Gasoline Parable
    Manville, Michael
    ORCID ICON IMG
    2020-10-01 | PDF
    Can pricing roads really help reduce congestion? One way to answer this question is to ask if not pricing roads causes congestion. This essay makes that case and does so by demonstrating the general principle that when goods are underpriced, shortages result, and congestion is essentially a shortage of road space. People react and adjust in many wa ...
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