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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 4241 - 4260 of 36908 results
  • 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 ...
  • Utilizing Machine Learning To CrossCheck Traffic Data and Understand Urban Mobility
    Utilizing Machine Learning To Cross-Check Traffic Data and Understand Urban Mobility
    Zhang, Zhao ;
    Yang, Xianfeng (Terry)
    2021-03-01 | PDF
    At UDOT, PeMS stores point data collected by roadside radar sensors, loop detectors, and micro-loops, while ClearGuide contains statewide probe data. PeMS data can greatly support mobility pattern studies but are only available at detector locations. In contrast, ClearGuide can provide statewide traffic speed information based on probe vehicle data ...
  • Big Transportation Data Analytics
    Big Transportation Data Analytics
    Liu, Xiaoyue Cathy ;
    Yi, Zhiyan
    2021-03-01 | PDF
    Traffic volume data is crucial in many applications, including transportation operation analysis, congestion management, accident prevention, etc. Yet an extensive capture of accurate volume information on a large-scale network can be difficult and costly. This research focuses on hourly traffic volume prediction in a statewide network using spatia ...
  • Road Pavement Condition Monitoring by Embedded Crowdsensing
    Road Pavement Condition Monitoring by Embedded Crowdsensing
    Cheng, Liang
    ORCID ICON IMG
    2021-02-27 | PDF
    This project investigates the design, implementation, and testing of a crowdsensing-based system that allows for pavement condition monitoring in a low-cost, reliable, and rapid manner. It also studies the incentive mechanisms for pavement crowdsensing that properly stimulate users to complete sensing tasks within the budget of platform cost and ov ...
  • Reducing Erosion Susceptibility of Coastal Highways Using BiologicallyBased Methods
    Reducing Erosion Susceptibility of Coastal Highways Using Biologically-Based Methods
    Montoya, Brina M.
    2021-02-22 | PDF
    Roadbeds supporting coastal highways in North Carolina (e.g., Highway 12) are susceptible to erosion during large storm events. Reinforcing vulnerable coastal subgrades and slopes can reduced the erosion potential and the coastal infrastructure can be maintained. Bio-mediated soil improvement methods can be used to stiffen sandy subgrade and slopes ...
  • Modern Project Prioritization for Transportation Investments
    Modern Project Prioritization for Transportation Investments
    Noyce, David A. ;
    McCahill, Chris
    2021-02-17 | PDF
    Project prioritization among transportation agencies has always been an evolving practice. At its core, it means setting goals and aligning decision-making processes to meet those goals. This study is aimed at making that process easier. For this study, our team reviewed project prioritization programs at 21 transportation agencies, including 14 st ...
  • A Comprehensive Program To Support Parents of New Teen Drivers
    A Comprehensive Program To Support Parents of New Teen Drivers
    Goodwin, Arthur ;
    O'Brien, Natalie P.
    2021-02-12 | PDF
    The objective of this project was to create a comprehensive program, called Time to Drive, to support parents of beginning drivers in North Carolina. The program provides critical guidance to parents at various points in the licensing process when this guidance is most needed. Time to Drive includes: • An in-person parent coaching session that enco ...
  • Integration of Automated Vehicle Sensing with Adaptive Signal Control for Enhanced Mobility [supporting datasets]
    Smith, Stephen F. ;
    Hawkes, Allen
    2021-02-04 | PDF
    This repository contains the results produced by CMU-UTC Project 294, titled "Integration of Autonomous Vehicles with Adaptive Signal Control to Enhance Mobility." The data contains comparative results of a pilot experiment designed to demonstrate the traffic flow efficiency can be improved by vehicle-to-infrastructure communication and use of vehi ...
    Dataset Supporting Files
  • Improvement of Climate Data for Use in MEPDG Calibration and Other Pavement Analysis Phase II
    Improvement of Climate Data for Use in MEPDG Calibration and Other Pavement Analysis – Phase II
    Durham, Stephan A. ;
    Cetin, Bora
    2021-02-01 | PDF
    Pavement temperature is one of the most important parameters that influence pavement performance. In the Pavement ME Design (PMED) software, the pavement temperatures are determined based on the shortwave radiation (SWR) and longwave radiation (LWR) models. In this project, the accuracy of such radiation models is assessed. The PMED-recommended net ...
  • Optimizing Winter Roadway Treatments for Georgia Pavements
    Optimizing Winter Roadway Treatments for Georgia Pavements
    Shen, Junan ;
    Yang, Xiaoming
    2021-02-01 | PDF
    The purpose of this project is to optimize the current practice of winter roadway treatments in Georgia by evaluating the efficiency of deicers commonly used by GDOT (i.e., sodium chloride and calcium chloride) on deicing and anti-icing and the effects of these deicers on pavement materials. To this end, the freezing point, penetration capability, ...
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