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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 3441 - 3460 of 36151 results
  • Capacity and Cost Benefits of Super 2 Corridors
    Capacity and Cost Benefits of Super 2 Corridors
    Brewer, Marcus A. ;
    Barrette, Timothy D
    2021-08-01 | PDF
    Super 2 corridors with passing lanes provide operational benefits to traditional two-lane highways by creating passing opportunities and reducing delay and crashes, leading to increased use of Super 2 corridors across Texas. However, as more passing lane length is added to a Super 2 corridor, the more it may resemble a traditional four-lane alignme ...
  • Impact of COVID19 on Disadvantaged Business Enterprises in Minnesota
    Impact of COVID-19 on Disadvantaged Business Enterprises in Minnesota
    Gaidzanwa, Moira ;
    Stewart, Rebecca
    2021-08-01 | PDF
    Minnesota’s Office of Civil Rights at the Minnesota Department of Transportation administers the Disadvantaged Business Enterprise (DBE) program. The DBE program is intended to remedy past and current discrimination against disadvantaged business enterprises, ensure a level playing field and foster equal opportunity in DOT-assisted contracts, impro ...
  • Literature Review and Data Analysis on the Impacts of Prolonged Events on Transit System Ridership
    Literature Review and Data Analysis on the Impacts of Prolonged Events on Transit System Ridership
    Liu, Yining ;
    Osorio, Jesus J.
    2021-08-01 | PDF
    The COVID-19 pandemic has drastically disrupted transit operations and induced significant transit ridership losses worldwide. Given its unprecedented duration, magnitude, and scale, the long-term effects are still unclear. Despite the differences, we can learn from previous disruptive events, such as terrorist attacks and epidemics, in the past 30 ...
  • Who Drives Where and When An Evaluation of Behavioral Responses To LicensePlated Based Driving Restrictions
    Who Drives, Where, and When? An Evaluation of Behavioral Responses To License-Plated Based Driving Restrictions
    Guerra, Erick ;
    Reyes, Ariadna
    2021-08-01 | PDF
    In an effort to manage increasing pollution and congestion in cities, regions, and megaregions around the world, governments have implemented various types of driving restriction programs. This report examines the effects of these restrictions and is divided into two chapters. The first provides a critical review of the literature on license-plate- ...
  • Tracking the Energy and Emissions of MBTA Rapid Transit Vehicles
    Tracking the Energy and Emissions of MBTA Rapid Transit Vehicles
    Oke, Jimi ;
    Christofa, Eleni
    2021-08-01 | PDF
    Rapid transit systems are critical components of public transportation networks in urban areas, in terms of their impact on person mobility and on monetary, energy, and environmental costs associated with their operations. To facilitate effective planning for current and future needs, a framework is required that provides important consumption metr ...
  • The Northeast Megaregion Travel Demand and Investment Model Final Report and Users Manual
    The Northeast Megaregion Travel Demand and Investment Model: Final Report and User’s Manual
    Landis, John D
    ORCID ICON IMG
    2021-08-01 | PDF
    The Northeast Megaregion Travel Demand and Investment (NEMR TD&I) Model is a standard 4-step travel demand model that brings together population and job forecasts for 2030 and 2040 with detailed highway and public transportation network data across the 13-state Northeast Megaregion to help transportation planners evaluate the demand for new transpo ...
  • Recruitment Toolkit for Local Transportation Agencies
    Recruitment Toolkit for Local Transportation Agencies
    Stanley, Katherine
    2021-08-01 | PDF
    In today's competitive job market, local agencies need to grow their employee pipeline through various outreach strategies. This toolkit is intended to help broaden the reach and impact of job postings to ensure that local agencies are developing and marketing an exciting and desired career option. This toolkit includes sample job descriptions, tip ...
  • Salt Lake City Airport Parking Garage Visual Inspection Report
    Salt Lake City Airport Parking Garage Visual Inspection Report
    Bordelon, Amanda ;
    Clyde, Madison
    2021-08-01 | PDF
    An overall project was initiated to determine whether the use of micro-silica slurry as a supplementary cementitious material was significantly beneficial at creating a low permeability corrosion-resistant concrete, particularly from the inspection of the old parking garage at the Salt Lake City Airport. This report outlines the initial visual and ...
  • Faulting Model Improvements for MEPDG
    Faulting Model Improvements for MEPDG
    Khazanovich, Lev ;
    Vandenbossche, Julie
    2021-08-01 | PDF
    Accurate joint transverse faulting prediction is essential for proper pavement design. Departments of transportation are encouraged to evaluate, recalibrate, and even modify the faulting model if discrepancies between predicted and field measured faulting are observed. The Pennsylvania Department of Transportation (PennDOT) identified a series of p ...
  • Optimizing Reclaimed Asphalt Pavement RAP Content in Unbound Base Aggregate
    Optimizing Reclaimed Asphalt Pavement (RAP) Content in Unbound Base Aggregate
    Tanyu, Burak F ;
    Ullah, Saad
    2021-08-01 | PDF
    This report is written to summarize the findings of a study conducted by George Mason University’s (GMU) Sustainable Geo Infrastructure (SGI) Research group to evaluate the expansion of using reclaimed asphalt pavement (RAP) and to optimize the RAP content in unbound base aggregate. The particular scope of the research presented in this report has ...
  • Analysis of Benefits of an Expansion to UDOTs Incident Management Program
    Analysis of Benefits of an Expansion to UDOT’s Incident Management Program
    Schultz, Grant G. ;
    Saito, Mitsuru
    2021-08-01 | PDF
    In 2018 the Utah Department of Transportation (UDOT) funded a study in which data were collected to evaluate performance measures for UDOT’s Incident Management Team (IMT) program. Afterwards, UDOT received funding to expand the size of the program. Additionally, TransSuite, a data source used by the UDOT Traffic Operations Center to log incident-r ...
  • Synergies of Combining Demand and SupplySide Measures to Manage Congested Streets
    Synergies of Combining Demand- and Supply-Side Measures to Manage Congested Streets
    Itani, Ibrahim ;
    Cassidy, Michael J.
    2021-08-01 | PDF
    An agent-based, multichannel simulation of a downtown area reveals the impacts of both redistributing traffic demand with time-dependent congestion pricing, and supplying extra capacity by banning left turns. The downtown street network was idealized, and loosely resembles central Los Angeles. On the demand-side, prices were set based on time-of-da ...
  • North Dakota Statewide Traffic Safety Survey 2021 Traffic Safety Performance Measures for State and Federal Agencies
    North Dakota Statewide Traffic Safety Survey, 2021: Traffic Safety Performance Measures for State and Federal Agencies
    Vachal, Kimberly ;
    Kubas, Andrew
    2021-08-01 | PDF
    The statewide driver traffic safety survey provides baseline metrics for the Safety Division and others to use in understanding perceptions and self-reported behaviors related to focus issues. A core set of questions addresses nationally agreed upon priorities, including seat belts, impaired driving, and speeding. In addition to the core issues, qu ...
  • Simplified Cone Penetration Test PerformanceBased Assessment of Liquefaction and Effects Phase 2 Tasks 510
    Simplified Cone Penetration Test Performance-Based Assessment of Liquefaction and Effects: Phase 2, Tasks 5–10
    Franke, Kevin W ;
    He, Jingwen
    2021-08-01 | PDF
    The purpose of the research presented here is to provide the benefit of the full performance-based probabilistic earthquake hazard analysis using Cone Penetration Test (CPT) data without requiring special software, training, and experience. To do this, simplified models of liquefaction triggering, post-liquefaction settlement, and lateral spread di ...
  • Evaluation of Asphalt Binder Rejuvenators for Use in Recycled Asphalt
    Evaluation of Asphalt Binder Rejuvenators for Use in Recycled Asphalt
    Rodezno, Carolina ;
    Moraes, Raquel
    2021-08-01 | PDF
    This research evaluated the effectiveness of bio-based and petroleum-based rejuvenators in restoring the properties of asphalt binder blends and mixtures containing high content of reclaimed asphalt pavement (RAP). The rheological and chemical evaluation of binder blends included rotational viscosity, Superpave Performance Grading (PG), Multiple St ...
  • Traffic Safety Evaluation at Reduced Conflict Intersections in Minnesota
    Traffic Safety Evaluation at Reduced Conflict Intersections in Minnesota
    Moreland, Max ;
    Leuer, Derek
    2021-08-01 | PDF
    Between 2010 and 2020, 49 Reduced Conflict Intersections (RCIs) were installed on Minnesota Department of Transportation (MnDOT) roadways. The RCI is an alternative intersection layout that is intended to provide safety benefits by limiting the number of points within an intersection that two or more vehicle paths might intersect. Both a before-aft ...
  • Entrusted EngineerinCharge A New Critical Position in the DesignBuild Team
    Entrusted Engineer-in-Charge: A New Critical Position in the Design–Build Team
    Ashuri, Baabak ;
    Lee, Jung Hyun
    2021-08-01 | PDF
    One of the main challenges that state departments of transportations (state DOTs) face in their design–build (DB) projects is to ensure that the design–build team upholds the highest standard of care in making complex engineering decisions involving multidisciplinary works. It is crucial to understand the underpinnings of engineering-related proble ...
  • Climate Action Plan Revitalizing Efforts to Bolster Adaptation Increase Resilience
    Climate Action Plan: Revitalizing Efforts to Bolster Adaptation & Increase Resilience
    United States. Department of Transportation. Office of the Secretary of Transportation. Office of the Deputy Assistant Secretary for Climate Policy
    2021-08-01 | PDF
    Pursuant to Section 211 of Executive Order (E.O.) 14008, Tackling the Climate Crisis at Home and Abroad and Council on Environmental Quality’s (CEQ) Implementing Instructions,1 the U.S. Department of Transportation (DOT or Department) has developed and submitted this Climate Action Plan (Plan). This Plan builds from the previous Climate Action Plan ...
  • PlugIn Electric Vehicle Diffusion in California Role of Exposure to New Technology at Home and Work
    Plug-In Electric Vehicle Diffusion in California: Role of Exposure to New Technology at Home and Work
    Chakraborty, Debapriya ;
    Bunch, David S
    2021-08-01 | PDF
    The market for plug-in electric vehicles (PEVs) that primarily include battery electric vehicles (BEVs) and plug-in hybrid vehicles (PHEVs) has been rapidly growing in California for the past few years. Given the targets for PEV penetration in the state, it is important to have a better understanding of the pattern of technology diffusion and the f ...
  • Continued Updating the Lane Closure Guide for Urban Highways in the Kansas City Kansas Metropolitan Area
    Continued Updating the Lane Closure Guide for Urban Highways in the Kansas City, Kansas, Metropolitan Area
    Fitzsimmons, Eric J. ;
    Sharif, Mirza Ahammad
    2021-08-01 | PDF
    Temporary work zones in the United States continue to be an important and necessary aspect of preserving, expanding, and maintaining the roadway infrastructure network. However, work zones present a unique variable in that depending on the type of work being performed, they may require a reduction in roadway capacity if one or more lanes are closed ...
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