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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 4821 - 4840 of 36908 results
  • Optimal Density Restrictions in the Los AngelesLong Beach CSA
    Optimal Density Restrictions in the Los Angeles-Long Beach CSA
    Parkhomenko, Andrii ;
    Delventhal, Matthew J.
    2020-08-01 | PDF
    We build a quantitative general equilibrium model of residence and employment choices under municipal density limits. Developers decide where to build, businesses decide where to offer jobs, and workers decide where to live and work given exogenous location characteristics, transport infrastructure, and zoning restrictions. We use employment, real ...
  • Institutions and Information Technology To Support Multimodal Integration in Employment Transportation
    Institutions and Information Technology To Support Multimodal Integration in Employment Transportation
    McAndrews, Carolyn A. ;
    Allon, Alexander
    2020-08-01 | PDF
    Transportation disadvantage is an underlying cause of low household earnings. In our recent experience implementing a shared ride program with taxicabs and vanpools we have found that transportation disadvantage cannot be solved by mobility alone. In our pilot project, we recognized a need for a type of organization—similar to a Transportation Mana ...
  • Combining Truck and Vessel Tracking Data to Estimate Performance and Impacts of Inland Ports
    Combining Truck and Vessel Tracking Data to Estimate Performance and Impacts of Inland Ports
    Hernandez, Sarah V ;
    Asborno, Magdalena I
    2020-08-01 | PDF
    The purpose of this project is to estimate the performance of multi-modal supply chains that use inland waterway ports. This is accomplished by developing a method to fuse publicly available datasets including truck and marine vessel tracking data and lock performance data. The study builds on a growing body of research related to multi-modal freig ...
  • Development of Vehicle Fleet Mix Forecast Models for Life Cycle Cost Forecast for Tunnel Ventilation Systems
    Development of Vehicle Fleet Mix Forecast Models for Life Cycle Cost Forecast for Tunnel Ventilation Systems
    Guo, Weihong ;
    Jafari, Mohsen A
    2020-08-01 | PDF
    Tunnel ventilation systems must be able to provide adequate air quality during normal operation in addition to supporting self-evacuation and rescue efforts during emergency incidents. To maintain low or negligible levels of tailpipe emission gases during normal operation, the operational cost of tunnel ventilation systems can be high. As the vehic ...
  • Signal Timing Strategy for Displaced Left Turn Intersections
    Signal Timing Strategy for Displaced Left Turn Intersections
    Qi, Yi ;
    Zhao, Qun
    2020-08-01 | PDF
    Conventional intersection design has met the challenges of increasing congestion and traffic delays. To solve this problem, transportation planners and engineers have proposed a variety of innovative intersection designs. Among these innovative intersection designs, displaced left turn (DLT) intersection has been implemented in 12 states in the USA ...
  • Transportation Equity for RITI Communities in Autonomous and Connected Vehicle Environment Opportunities and Barriers
    Transportation Equity for RITI Communities in Autonomous and Connected Vehicle Environment: Opportunities and Barriers
    Sorour, Sameh ;
    Abdel-Rahim, Ahmed
    2020-08-01 | PDF
    This report summarizes the results of a study conducted to document the safety and mobility needs of Rural, Isolated, Tribal, or Indigenous (RITI) communities and to identify autonomous and connected vehicle technology that have the potential of addressing these needs. A review of the administrative structure for the five Native American Tribes in ...
  • Guide to Developing a Vision Zero Plan
    Guide to Developing a Vision Zero Plan
    LaJeunesse, Seth ;
    Naumann, Rebecca B
    2020-08-01 | PDF
    A Vision Zero Plan provides direction specifically around the vision to eliminate all traffic-related deaths and severe injuries in the community. The purpose of this Guide is to assist communities in developing a Vision Zero Plan. The Guide describes the major steps involved in developing a plan, with an emphasis on best practices. It is also usef ...
    Supporting Files
  • Assessment of Compatibility of Mineral Aggregates and Binders Used in Highway Construction and Maintenance Projects
    Assessment of Compatibility of Mineral Aggregates and Binders Used in Highway Construction and Maintenance Projects
    Hossain, Zahid ;
    Elsayed, Ashraf
    2020-08-01 | PDF
    Stripping and delamination have been deemed as some of the major premature pavement distresses to most state Departments of Transportations (DOTs) and highway agencies including the Arkansas Department of Transportation (ARDOT). It is believed that the poor compatibility between asphalt binders and aggregates is one of the major reasons behind this ...
  • Protocols for Concrete Bridge Deck Protections and Treatments
    Protocols for Concrete Bridge Deck Protections and Treatments
    Bektas, Basak ;
    Albughdadi, Ahmed
    2020-08-01 | PDF
    The main objective of this research project was to develop a cost-effective life-cycle treatment plan for the preservation of Wisconsin bridge decks. The research team identified a comprehensive list of strategies through a review of current practice and department of transportation (DOT) policies and provided data-driven estimates of the performan ...
  • Optimizing the Geometric Configuration and Manufacturing Process of High Mast Illumination Poles
    Optimizing the Geometric Configuration and Manufacturing Process of High Mast Illumination Poles
    Montoya, Arturo ;
    Matamoros, Adolfo
    2020-08-01 | PDF
    This work presents the development of a high-fidelity model that accounts for the cumulative effect of welding and hot-dip galvanizing on the determining the resulting residual stresses and deformations induced during the manufacturing process of high mast illumination poles (HMIPs). This model is meant to elucidate the root causes of weld toe crac ...
  • Development of WeighinMotion Data Quality Control Algorithms and Procedures
    Development of Weigh-in-Motion Data Quality Control Algorithms and Procedures
    Chorzepa, Mi G ;
    Kim, S. Sonny
    2020-08-01 | PDF
    This report recommends a Weigh-In-Motion (WIM) data quality control (QC) process that will assist in delivering higher quality WIM data and continuously improving WIM program performance as its user base grows within the Georgia Department of Transportation (GDOT). Specifically, this research study serves to establish a procedure for off-site offic ...
  • Development of Guidelines for Implementation of Contraflow LeftTurn Lanes at Signalized Intersections
    Development of Guidelines for Implementation of Contraflow Left-Turn Lanes at Signalized Intersections
    Qi, Yi ;
    Zhao, Qun
    2020-08-01 | PDF
    An innovative intersection design, Contraflow left-turn lane (CLL), designed for increasing the left-turn capacity has been increasingly implemented at the signalized intersections. This study developed a systematic method for determining the length of CLL and the signal timing plan for implementing CLL at signalized intersections. The signal timin ...
  • Assessment of Parcel Delivery Systems Using Unmanned Aerial Vehicles
    Assessment of Parcel Delivery Systems Using Unmanned Aerial Vehicles
    Boyles, Stephen D. ;
    Zhu, Tengkuo
    2020-08-01 | PDF
    The idea of deploying electric vehicles and unmanned aerial vehicles (UAVs), also known as drones, to perform "last-mile" delivery in logistics operations has attracted increasing attention in the past few years. In this paper, an electric vehicle travelling salesman problem with drone (EVTSP-D) is formulated as a mixed-integer/linear program to ai ...
  • Analysis of the Causes of Workforce Shortages Create Guidelines for Education and Workforce Development in Transportation to Generate Future Careers for the Navajo Nation
    Analysis of the Causes of Workforce Shortages: Create Guidelines for Education and Workforce Development in Transportation to Generate Future Careers for the Navajo Nation
    Ehteshami, Gholam R
    ORCID ICON IMG
    2020-08-01 | PDF
    Activities were dedicated to the collections, summarizations and categorizing more research articles related to the analysis of the sources of workforce deficiencies. The focus was on the technical and educational solution methods and strategies, guideline relevant to the workforce development. The times also were committed to the development of ed ...
  • Estimating the Costs of New Mobility Travel Options Monetary and NonMonetary Factors
    Estimating the Costs of New Mobility Travel Options: Monetary and Non-Monetary Factors
    Fulton, Lewis M ;
    Compostella, Junia
    2020-08-01 | PDF
    UC Davis researchers have developed a cost model of travel choices that individuals make related to urban vehicle travel. These choices can include deciding to own, ride in, and drive a private vehicle or use pooled or solo ridesourcing (e.g., Uber). The model considers both monetary and non-monetary factors that affect travel choice. Monetary fact ...
  • Destructive Testing of IDOT Bridge Structure Number 0203087
    Destructive Testing of IDOT Bridge Structure Number 020-3087
    Golecki, Thomas F. ;
    Spencer Jr, B. F.
    2020-08-01 | PDF
    The partial collapse of Illinois Department of Transportation structure 020-3087 on October 1, 2019, provided IDOT with the opportunity to evaluate the in situ strength of a precast, prestressed concrete deck beam bridge after 50 years in service. An undamaged beam was transported to the Newmark Structural Engineering Laboratory and tested in three ...
  • Multimodal Transportation Engineering Curriculum for Middle and High School Students
    Multimodal Transportation Engineering Curriculum for Middle and High School Students
    Willis, Olivia ;
    Reed, Cheryl
    2020-08-01 | PDF
    The goal of this Center for Advanced Multimodal Mobility Solutions and Education (CAMMSE) project was to engage local middle and high school students in transportation engineering activities that include pre- and post-testing in order to assess their learning and the factors that influenced their learning. To meet this goal, the following objective ...
  • MmWave Codebook Selection in RapidlyVarying Channels via Multinomial Thompson Sampling
    MmWave Codebook Selection in Rapidly-Varying Channels via Multinomial Thompson Sampling
    Zhang, Yi ;
    Basu, Soumya
    2020-08-01 | PDF
    Millimeter-wave (mmWave) communications, using directional beams, is a key enabler for high-throughput mobile ad hoc networks. These directional beams are organized into multiple codebooks according to beam resolution, with each codebook consisting of a set of equal width beams that cover the whole angular space. The codebook with narrow beams deli ...
  • Strategic and Operational Strategies to Inform First and Last Mile Services Case Studies for Robinson and Moon Townships
    Strategic and Operational Strategies to Inform First- and Last- Mile Services: Case Studies for Robinson and Moon Townships
    Grahn, Rick ;
    Qian, Sean
    2020-08-01 | PDF
    Traditional public transit is designed to serve high-density, urban areas with concentrated travel patterns using fixed routes and schedules. Mobility gaps exist for populations who are captive to public transit and need to travel to locations where public transit does not cover. Emerging technologies enable bridging such a gap by providing flexibl ...
  • Bridge Construction Monitoring using LIDAR for Quantified Objective QualityControl QualityAssurance QOQCQA
    Bridge Construction Monitoring using LIDAR for Quantified, Objective Quality-Control Quality-Assurance (QOQCQA)
    Moreu, Fernando ;
    Lippitt, Christopher D.
    2020-08-01 | PDF
    Transportation infrastructure construction quality control and quality assurance demands construction monitoring by field inspectors. Currently, these inspectors monitor infrastructure by measuring and photographing structures. These tasks allow them to assess any correction decision during construction or to inform about the quality of the constru ...
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