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.
With increasing trends and public requests for crosswalks, agencies are seeking resources on best practices and guidance for pedestrian crossings to improve safety, comfort, and consistency of the transportation network. This guidebook provides a comprehensive overview of rural pedestrian crossings for both pedestrians and drivers by examining Minn
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This report presents two major aspects related to the end-zone behavior of prestressed concrete bulb-tee girders: i) laboratory experiments and ii) full-scale finite element modeling. The first part of the report discusses the behavior of anchorage zones, also known as end zones, with discrete rebars and continuous meshes. To examine the implicatio
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This report examines the relationships between the characteristics of transit-oriented development (TOD) and (1) the use of transit and non-motorized modes (walking, cycling, scooting) and (2) local shopping behaviors and behavioral changes during and after the COVID-19 pandemic. The team gathered data from 341 respondents via an online survey and
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This report examines the relationships between the characteristics of transit-oriented development (TOD) and (1) the use of transit and non-motorized modes (walking, cycling, scooting) and (2) local shopping behaviors and behavioral changes during and after the COVID-19 pandemic. The team gathered data from 341 respondents via an online survey and
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Through this research, NJ TRANSIT sought to understand how women and members of the lesbian, gay, bisexual, transgender, queer plus community, sometimes referred to as sexual and gender minorities (SGMs) travel on NJ TRANSIT so the agency can provide better accommodations for all customers, regardless of sexual orientation or gender identity. The o
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Through this research, NJ TRANSIT sought to understand how women and members of the lesbian, gay, bisexual, transgender, queer plus community, sometimes referred to as sexual and gender minorities (SGMs) travel on NJ TRANSIT so the agency can provide better accommodations for all customers, regardless of sexual orientation or gender identity. The o
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This document presents a curated collection of vintage mid-20th-century advertisements from The Timken Company, a pioneering manufacturer of roller bearings for railroad applications. Compiled by Edwin R. Kraft in December 2024, the collection emphasizes Timken’s promotional campaign for “Roller Freight,” a term highlighting the adoption of roller
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This research addresses the application of high-strength reinforcing steel in Texas bridge construction. The project involved experimental and analytical work to evaluate the effectiveness of current design recommendations for high-strength reinforcing steel in various bridge structural components. These components include spliced beam, CIP-PCP dec
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The Minnesota Department of Transportation (MnDOT) recognizes the importance of subsurface drainage in pavements. Various studies have indicated that adequate drainage of pavement layers enhances performance of pavements in general. MnDOT thus uses various types of subsurface drainage in varying degrees of styles, frequency of use, and minor variat
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The late merge, or “zipper” merge, has become a common strategy to increase work zone capacity by encouraging drivers to stay in their lanes until they reach a defined merge area, where they alternately merge. While the zipper merge has been shown to provide improved operational performance, there is considerable variability in driver familiarity a
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As online shopping nears its third decade, it is clear that its impacts on urban goods flow are profound. Increased freight traffic and related negative externalities such as greenhouse gas emissions and local air pollution can impede sustainability goals. In response, e-retailers are exploring innovative distribution strategies to enhance last-mil
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Precast concrete (PC) is manufactured in a controlled environment to provide desired quality, durability and efficiency to build transportation assets that address significant infrastructure challenges faced by the nation. Quality deficiencies during any lifecycle phase can easily off set the expected benefits, leading to premature failures and exc
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The objective of the control system is to run the deicing system efficiently and effectively under different winter weather conditions. The system can be operated for bridge deicing in heat pump or bypass mode. The heat pump mode involves all four heat pumps and the GLHE during bridge deicing, while the bypass mode only relies on GLHE to heat the b
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Bridges structures deteriorate over time due to various factors. Understanding the factors that affect bridge deterioration rates is necessary for state agencies to maintain the safety and functionality of bridges during their design service life. To improve deterioration modeling in Montana, significant factors affecting bridge deterioration were
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Short-span bridge superstructures are commonly made of precast concrete elements, and those elements are proportioned according to the properties of conventional concrete. The emergence of ultra-high-performance concrete (UHPC), and the release of the AASHTO Guide Specification for Structural Design with UHPC, creates new possibilities for the rede
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The objective of this project was to examine and document liquid deicing storage and pump systems currently being used by departments of transportation and public works agencies across the country and best practices for managing and maintaining these systems. Using information gathered from surveys and interviews with transportation agencies and ve
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While pedestrian safety is found in many Strategic Highway Safety Plans across the country, there may be potentially competing values and beliefs that influence the deployment of effective pedestrian safety strategies. Understanding shared values and beliefs among transportation stakeholders about pedestrian safety is critical to growing a positive
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Tall highway noise barriers have served as an effective noise abatement strategy. However, it comes with the high cost and limited adoption in diverse environments. The purpose of this study was to investigate the feasibility and reasonableness of short safety barriers as a highway noise abatement strategy. Through purposeful selection, five out of
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One critical aspect of a proactive approach to improving the safety of commercial motor vehicles (CMVs) involves how to communicate with CMV drivers safely and effectively through an electronic notification system (ENS). The objectives of this project are to: 1) conduct a review of existing ENS methods in use by CMV drivers, trucking companies, and
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The Missouri Department of Transportation (MoDOT) has implemented High Friction Surface Treatment (HFST) in various locations across the state to reduce roadway departure crashes by improving pavement friction. To prevent premature failure and to ensure that the HFST performs adequately throughout the design life, this study evaluates the pavement
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