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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 2021 - 2040 of 36114 results
  • The Development of Knowledge in the Application of StrutandTie Methods
    The Development of Knowledge in the Application of Strut-and-Tie Methods
    Wang, Hwa-Ching ;
    Daou, Anas
    2023-05-01 | PDF
    The strut-and-tie method (STM) is a reliable and widely used approach for designing reinforced concrete members, but there are still gaps in knowledge that need to be addressed to optimize its use in common design scenarios. Addressing these gaps would lead to more efficient and cost-effective design solutions. This requires additional experimental ...
  • Comparing Public Transportation Services for Rural States in the Upper Midwest and Great Plains Region Executive Summary Surcom Research Summary
    Comparing Public Transportation Services for Rural States in the Upper Midwest and Great Plains Region — Executive Summary [Surcom Research Summary]
    Mattson, Jeremy ;
    Quayson, Bright
    2023-05-01 | PDF
    This study compares the level of public transportation services provided in North Dakota to those of the surrounding states of South Dakota, Montana, Wyoming, Nebraska, and Greater Minnesota. Separate analyses are performed for rural and urban transit. Overall, North Dakota performs well by some measures and not as well by others, but the level of ...
  • Rehabilitation and Load Rating of Deteriorated Timber Bridges in Colorado Parametric Investigations and Implementation
    Rehabilitation and Load Rating of Deteriorated Timber Bridges in Colorado: Parametric Investigations and Implementation
    Kim, Yail Jimmy
    2023-05-01 | PDF
    This report presents three major aspects that are related to the evaluation of timber bridges with and without repair: i) laboratory testing, ii) finite element modeling, and iii) load ratings. In addition, worked examples are provided to demonstrate the implementation of research findings. The first part of the report explores the effectiveness of ...
  • Optimal Approach for Addressing Reinforcement Corrosion for Concrete Bridge Decks in Illinois Phase II
    Optimal Approach for Addressing Reinforcement Corrosion for Concrete Bridge Decks in Illinois — Phase II
    Gombeda, Matthew J ;
    Lallas, Zoe N
    2023-05-01 | PDF
    This report presents the expansion of a previously introduced life-cycle cost calculation framework for concrete bridge decks in Illinois. In addition to the alternative reinforcement options examined in the Illinois Center for Transportation and Illinois Department of Transportation project R27-SP49, two additional reinforcing bar types—stainless ...
  • Calibration of Highway Safety Manual Safety Performance Functions for Freeway Ramp Terminals in Virginia
    Calibration of Highway Safety Manual Safety Performance Functions for Freeway Ramp Terminals in Virginia
    Appiah, Justice
    2023-05-01 | PDF
    Chapter 19 of the Highway Safety Manual (HSM) provides safety performance functions (SPFs) for freeway ramps and crossroad terminals. The chapter includes 56 predictive models for ramp terminals characterized by terminal type, intersection control, crash severity, area type, and number of crossroad lanes. These SPFs were developed with data from ot ...
  • Consultant Support for Intelligent Compaction and PaverMounted Thermal Profiling Projects in 20222023
    Consultant Support for Intelligent Compaction and Paver-Mounted Thermal Profiling Projects in 2022-2023
    Chang, George K ;
    Gilliland, Amanda
    2023-05-01 | PDF
    Due to the success of the MoDOT 2017-2021 Intelligent Compaction and Paver-Mounted Thermal Profiling (IC-PMTP) projects that demonstrate the paving quality improvements on numerous field projects, MoDOT has established a plan that includes additional IC-PMTP projects in 2022 and 2023. To ensure the continued success of the MoDOT IC-PMTP projects in ...
  • NYC DOT Curbside Level 2 EV Charging Pilot Evaluation Report
    NYC DOT Curbside Level 2 EV Charging Pilot: Evaluation Report
    New York (N.Y.). Department of Transportation  ...
    2023-05-01 | PDF
    In June 2021, the New York City Department of Transportation (NYC DOT), in partnership with Con Edison, launched the city’s first curbside electric vehicle (EV) charging pilot program. The pilot includes 100 on-street Level 2 chargers distributed across 35 locations in the five boroughs. Up to 20 additional chargers have been or are in the process ...
  • Feasibility Study Application of Steel Sheet Piles for the Abutment of WaterCrossing Bridges in Nebraska
    Feasibility Study: Application of Steel Sheet Piles for the Abutment of Water-Crossing Bridges in Nebraska
    Kim, Seunghee ;
    Eun, Jongwan
    2023-05-01 | PDF
    The overall goal of this study is to investigate the anticipated performance of steel sheet-pile bridge abutments to encourage its wider application to not only new construction but also repair and replacement of existing water-crossing bridges in Nebraska. For this purpose, this study first reviewed several bridge cases with axially loaded sheet p ...
  • Impact of Curling and Warping on Concrete Pavement Phase II
    Impact of Curling and Warping on Concrete Pavement: Phase II
    Tian, Kexin ;
    King, Daniel
    2023-05-01 | PDF
    Curling and warping behavior due to temperature and moisture variation has been widely considered an influential factor affecting the smoothness of jointed plain concrete pavement (JPCP). In recent decades, while extensive efforts have been made to quantify the impact of curling and warping-related deflections on the smoothness of JPCP, a standardi ...
  • Impact of Curling and Warping on Concrete Pavement Phase II Technology Summary
    Impact of Curling and Warping on Concrete Pavement: Phase II [Technology Summary]
    Ceylan, Halil ;
    Kim, Sunghwan
    2023-05-01 | PDF
    Evaluating the effects of various environmental conditions and design parameters on curling and warping can help improve the performance of Iowa concrete pavements.
  • Bicycles and Micromobility for Disaster Response and Recovery Manuscript
    Bicycles and Micromobility for Disaster Response and Recovery [Manuscript]
    Fitch-Polse, Dillon Taylor ;
    Chen, Chen
    2023-05-01 | PDF
    Bicycles and other forms of micromobility have been anecdotally used in past disasters to help save lives and improve community recovery. However, research and practice are scarce on this resilient transportation strategy, which limits its usefulness and possible benefits. To fill this gap, our paper investigates the potential role bicycles and mic ...
  • Outdoor Information Panels To Convey RealTime Travel Information for Ridership Recovery
    Outdoor Information Panels To Convey Real-Time Travel Information for Ridership Recovery
    Gao, Song ;
    Christofa, Eleni
    2023-05-01 | PDF
    The MBTA has launched an Outdoor Information Panel (OIP) program. This will update legacy outdoor advertising locations or add other strategic locations near major roadways through digitization, for which 25% of the playlists will have dedicated "set aside" time to deliver real-time travel information (RTTI). This project developed guidelines for d ...
  • Evaluation of FDOT Corrosion and Control Programs
    Evaluation of FDOT Corrosion and Control Programs
    Fadden, Matthew ;
    Jones, Casey
    2023-05-01 | PDF
    Corrosion of Florida’s bridge infrastructure has shown to be costly for FDOT, both due to the number of bridges and harsh environmental conditions across the State. While the mechanisms that describe corrosion within reinforced concrete bridge elements are well understood, the ability to limit corrosion in practice has led to many methods that aim ...
  • DowntoEarth Winter Operations Sensing and Data Applications
    Down-to-Earth Winter Operations Sensing and Data Applications
    Bhat, Chandra ;
    Claudel, Christian
    2023-05-01 | PDF
    Weather-responsive management strategies (WRMS) are innovative approaches to utilizing data in making decisions for roadway operations and maintenance. Texas Department of Transportation (TxDOT) has been evaluating low-cost approaches for enhancing WRMS, with special emphasis on suburban and rural environments. The main focus of Project 0-7007 is t ...
    Supporting Files
  • Development of a Traffic Management Decision Support Tool for Freeway Incident Traffic Management FITM Plan Deployment Phase 3 An Incident Duration and Impact Prediction IDIP System
    Development of a Traffic Management Decision Support Tool for Freeway Incident Traffic Management (FITM) Plan Deployment Phase 3: An Incident Duration and Impact Prediction (IDIP) System
    Huang, Yen-Lin ;
    Cheng, Yao
    2023-05-01 | PDF
    This phase of the study has finalized the innovative system for real-time prediction of a detected incident’s duration and its potential traffic impacts on both the subject freeway and its neighboring local streets due to the queues and resulting detouring off-ramp flows. With such information, highway agencies responsible for incident response and ...
  • Automated Vehicle Recommendations for Texas A Study of Highway and Urban Operational Design Domains
    Automated Vehicle Recommendations for Texas: A Study of Highway and Urban Operational Design Domains
    Chin, Kristie ;
    Gold, Andrea
    2023-05-01 | PDF
    Automated vehicles (AVs) present significant potential; yet, their technological maturity and performance remain to be proven. With several deployments underway in the state, it is critical for the Texas Department of Transportation (TxDOT) to provide the public with assurances that the AVs are performing safely in their intended operational enviro ...
  • Implementation of Enhanced Probe Data CANBUS for Tactical Workzone and Winter Operations Management
    Implementation of Enhanced Probe Data (CANBUS) for Tactical Workzone and Winter Operations Management
    Desai, Jairaj ;
    Sakhare, Rahul Suryakant
    2023-05-01 | PDF
    For over a decade, segment-based probe data has been extensively used by transportation stakeholders for monitoring mobility on Indiana roadways. However, enhanced probe data from connected vehicles includes a richer dataset that can provide more detailed real-time and after-action reviews. This enhanced data includes detailed vehicle trajectories, ...
  • Mitigating Projects Missing Deadlines
    Mitigating Projects Missing Deadlines
    Bossert, Justin ;
    Kester, Chris
    2023-05-01 | PDF
    This project's purpose was to produce an educational guide for agencies on contract language and processes that, when used, will improve the likelihood of a contractor delivering a project on time. The guide is supported by the following: 1) Review of current industry standards and literature related to contract time determination, contract type, a ...
  • Tacit Knowledge Model to Support Knowledge Capture and Transfer in GDOT
    Tacit Knowledge Model to Support Knowledge Capture and Transfer in GDOT
    Guerra-Zubiaga, David
    2023-05-01 | PDF
    The research team has undertaken a comprehensive study of Tacit Knowledge Management (TKM) within the Georgia Department of Transportation (GDOT) and compared it to other state DOTs. Through document analysis, surveys, and a case study of the I-85 Highway Bridge Collapse, the team has developed a final draft of the GDOT Tacit Knowledge Model (TKM). ...
  • Advancing Equity in Accessibility and Travel Experiences The Role of Gender and Identity
    Advancing Equity in Accessibility and Travel Experiences: The Role of Gender and Identity
    Fan, Yingling ;
    Song, Ying
    2023-05-01 | PDF
    Gender can have a significant influence on people’s behaviors and experiences. Hence, excluding gender diversity in transportation research and practices can result in biased or incomplete understandings of issues and perceptions about transportation and quality of life. This study examined whether and how gender, in a broader sense, can result in ...
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