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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 3601 - 3620 of 36011 results
  • Aftermarket Cameras in Winter Maintenance Vehicles
    Aftermarket Cameras in Winter Maintenance Vehicles
    Gallagher, Mark ;
    Curd, Chris
    2021-06-01 | PDF
    Mounting video cameras on winter maintenance vehicles can assist with operational decisions and enhance situational awareness for operators. To help agencies maximize the benefits of these systems, this project conducted a state-of-the-practice literature review, survey and interviews to identify types, uses and best practices for on-vehicle camera ...
  • Field Implementation of the Vertical In situ Permeameter VIP Final Report
    Field Implementation of the Vertical In situ Permeameter (VIP) [Final Report]
    Rodgers, Michael ;
    Mohseni, Ana
    2021-05-31 | PDF
    This research involved improving the vertical in situ permeameter (VIP), a new apparatus developed in FDOT Project BDV31-977-23 for estimating in situ permeability, and validating the prior research results through statewide testing. The VIP is a unique wireless instrument that allows the engineer to estimate mean permeability at multiple depths re ...
  • Enhancing Traffic Flow and Driving Safety via Artificial Intelligence
    Enhancing Traffic Flow and Driving Safety via Artificial Intelligence
    Shahmoradi, Amir ;
    Osborne, Joshua
    2021-05-31 | PDF
    Motivated by the priorities highlighted by Texas Department of Transportation (TXDOT) and following the guidelines in the recent presidential “Executive Order on Maintaining American Leadership in Artificial Intelligence” in 2019, this proposal aims to utilize the state-of-the-art tools and techniques in the field of Artificial Intelligence and Dat ...
  • Exploring the Influence of Carbon Footprint and Health Benefits in Parking Location Decisions
    Exploring the Influence of Carbon Footprint and Health Benefits in Parking Location Decisions
    Cheu, Ruey Long ;
    Ruiz, Emiliano
    2021-05-31 | PDF
    The objective of this project is to answer the Research Question: If the information on carbon footprint and health benefits are available, what are their influences relative to permit fee and last-mile travel time in parking location decisions? This project focused on commuter students at The University of Texas at El Paso (UTEP). In this project, ...
  • Design and Detailing of CastinPlace and Precast Concrete Approach Slabs
    Design and Detailing of Cast-in-Place and Precast Concrete Approach Slabs
    Morcous, George ;
    Abo-Elkhier, Mostafa
    2021-05-31 | PDF
    Approach slab is a structural concrete slab that spans from the backwall of the abutment (i.e. end of the bridge floor) to the beginning of the paving section. The purpose of the approach slab is to carry the traffic loads over the backfill behind the abutments to avoid differential settlement that causes bumps at the bridge ends. Castin-place conc ...
  • Rapid Seismic Repair of Column to Footing Connections Phase 2
    Rapid Seismic Repair of Column to Footing Connections – Phase 2
    Brodbeck, Taylor J ;
    Shurow, Zachary A
    2021-05-31 | PDF
    Presented in this report is the development of a rapid seismic repair of column to footing connections. The use of plastic hinge relocation as a repair technique for extreme levels of damage in reinforced concrete bridge columns is investigated. Before the development of this repair, if a column was severely damaged (e.g. had fractured longitudinal ...
  • Identification of Metrics Used for Varying Levels of Traffic Analysis
    Identification of Metrics Used for Varying Levels of Traffic Analysis
    Xiong, Chenfeng ;
    Yang, Mofeng
    2021-05-21 | PDF
    This project was completed to support the Maryland Department of Transportation State Highway Administration (MDOT SHA) as it actively pursues the most appropriate metrics for transportation projects decision making. The goal of this research project was to identify the state-of-the-practice performance metrics currently employed by state agencies ...
  • Research and Education for Optimizing the Development and Implementation of an Unmanned Aircraft Program at the Nebraska Department of Transportation
    Research and Education for Optimizing the Development and Implementation of an Unmanned Aircraft Program at the Nebraska Department of Transportation
    Woldt, Wayne ;
    Starr, Jon
    2021-05-19 | PDF
    This report describes the development and implementation of an Unmanned Aircraft System Program at the Nebraska Department of Transportation (NDOT). The project involved the selection and purchase of appropriate UAS and imaging systems for NDOT, education and training for NDOT personnel with classroom and hands-on operation of UAS with the goal of ...
  • Utilization of Traffic Speed Deflectometer for Pavement Management
    Utilization of Traffic Speed Deflectometer for Pavement Management
    Huynh, Nathan ;
    Gassman, Sarah
    2021-05-18 | PDF
    This project investigated how the Traffic Speed Deflectometer (TSD) data the South Carolina Department of Transportation (SCDOT) obtained as part of the pooled fund studies (i.e., TPF-5(282) and 5(385)) can be used to improve the selection of candidate projects for rehabilitation. The analysis using approximately 950 miles of TSD data collected on ...
  • FlyBy Image Processing for RealTime Congestion Mitigation
    Fly-By Image Processing for Real-Time Congestion Mitigation
    Uddin, Nasim ;
    Williams, Billy M.
    2021-05-13 | PDF
    Traffic monitoring is the centerpiece of congestion mitigation and traffic management. Whilst surveillance technologies have matured enough to provide informative depiction for the traffic, the current state-of-the-art systems cannot support immediate congestion problems. Proactive congestion mitigation requires a) real-time surveillance for traffi ...
  • Hydraulic Inspection Vehicle Explorer HIVE Culvert Upgrade
    Hydraulic Inspection Vehicle Explorer (HIVE) Culvert Upgrade
    Huston, Dryver ;
    Xia, Tian
    2021-05-11 | PDF
    The Vermont Agency of Transportation (VTrans) has adopted a policy requiring all culverts to be inspected every 5 years, resulting in around 9,600 small culverts needing to be inspected annually. Many of these culverts have small diameters that preclude human inspection. This report describes the design, fabrication and testing of a lightweight and ...
  • Analyzing the Effects of COVID19 on Human Mobility and Transit Ridership in the Pacific Northwest Region
    Analyzing the Effects of COVID-19 on Human Mobility and Transit Ridership in the Pacific Northwest Region
    Swoboda-Colberg, Skye ;
    Huang, Li
    2021-05-10 | PDF
    This study investigated the effects of COVID-19 on trip reductions and decreases in transit ridership in the Pacific Northwest region of the United States, encompassing Washington, Oregon, Idaho, and Alaska. By utilizing multiple data sources, the authors found that work-related trips in the region declined by more than 30 percent since March of 20 ...
  • Smart and Environmentally Friendly Winter Maintenance Solutions for Safe Winter Mobility Use of a Microwave Method to Prototype Electrically Conductive Concrete
    Smart and Environmentally Friendly Winter Maintenance Solutions for Safe Winter Mobility: Use of a Microwave Method to Prototype Electrically Conductive Concrete
    Nassiri, Somayeh ;
    Moman, Abdullah
    2021-05-04 | PDF
    Electrically conductive pavement materials have shown potential as self-deicing pavements under passed electrical current. In this project, a method using microwaves was used to evaluate the electrical conductivity of pavement materials for the purpose of melting snow and ice and reducing the need for sanding and salting in the winter. The prelimin ...
  • Safety in Numbers Developing Improved Safety Predictive Methods for Pedestrian Crashes at Signalized Intersections in Utah Using Push ButtonBased Measures of Exposure
    Safety in Numbers? Developing Improved Safety Predictive Methods for Pedestrian Crashes at Signalized Intersections in Utah Using Push Button-Based Measures of Exposure
    Singleton, Patrick A. ;
    Mekker, Michelle
    2021-05-01 | PDF
    The focus of this study was threefold: (1) to estimate models of pedestrian crash frequency at signalized intersections; (2) to develop safety performance functions and crash modification factors for better interpretation and application of models’ results; and (3) to examine whether the “safety in numbers” effect applies to pedestrian safety in th ...
  • A Synthesis on Data Mining Methods and Applications for Automated Fare Collection AFC Data
    A Synthesis on Data Mining Methods and Applications for Automated Fare Collection (AFC) Data
    Cevallos, Fabian ;
    Turino, Lilibeth
    2021-05-01 | PDF
    Automated Fare Collection (AFC) systems have been widely adopted by transit agencies around the world. AFC systems can provide a bias-free and low-cost approach to obtaining long-term continuous observations of transit passenger travel behavior. The availability of AFC data can help examine the behavior of passengers and the demand characteristics ...
  • RealWorld Data Driven Characterization of Urban Human Mobility Patterns
    Real-World Data Driven Characterization of Urban Human Mobility Patterns
    Jauhri, Abhinav ;
    Shen, John Paul
    2021-05-01 | PDF
    Human movement in urban areas is a complex phenomenon to analyze and understand. The geographical spread of human movement, described by locations between which individuals tend to travel, varies from city to city. The geographical spread of such locations within a city would also vary with time. This research explores how to formally analyze and u ...
  • Assessment of Asbestos Containing Materials in Idaho Bridges
    Assessment of Asbestos Containing Materials in Idaho Bridges
    Ibrahim, Ahmed A ;
    Arowojolu, Olaniyi
    2021-05-01 | PDF
    The Idaho Transportation Department (ITD) has more than 4,000 highway bridges under its control in the State of Idaho. For bridges built before 1980, the Environmental Protection Agency (EPA) requires State Transportation Departments to provide inspection reports concerning the presence of asbestos materials for any bridge that is eligible for majo ...
  • Evaluating Performance and Benefits of Road Reconfigurations in Tennessee
    Evaluating Performance and Benefits of Road Reconfigurations in Tennessee
    Aryal, Sameer ;
    Cherry, Christopher
    2021-05-01 | PDF
    A vital issue evaluating road reconfiguration projects is quantifying the benefits provided to the corridor and surrounding community. Based on past studies, reconfiguring an automobile-oriented travel lane to accommodate other modes of transportation is found to have neutral, if not progressive, effects on factors such as livability, safety, and e ...
  • Mitigation of Corrosion in Continuously Reinforced Concrete Pavement Volume 1
    Mitigation of Corrosion in Continuously Reinforced Concrete Pavement Volume 1
    Jones, Allen ;
    Wehbe, Nadim I.
    2021-05-01 | PDF
    An evaluation of CRCP was conducted in order to determine the extent of possible corrosion of CRCP on selected interstates in South Dakota. General observations showed there were sections of severe and localized reinforcement corrosion at some crack locations. Crack mapping, chloride tests profiles, scanning electron microscopy (SEM) analyses, and ...
  • Analytical Framework for Life Cycle and Performance Assessment of Equipment Programs
    Analytical Framework for Life Cycle and Performance Assessment of Equipment Programs
    Liu, Xiaoyue Cathy ;
    Yi, Zhiyan
    2021-05-01 | PDF
    In this project, we analyzed the optimal life cycles for three types of trucks for the Utah Department of Transportation (UDOT) using a macro-level approach. The types of truck include loaders, graders, and sweepers. The life cycle analysis follows a similar procedure with respect to the optimal life cycle analysis for Class 8 snowplow trucks that ...
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