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.
This research project presents an overview of the literature on urban freight and comparison of minimum requirements for freight loading spaces in the 20 largest cities in the United States, as well as the four most populous cities in North Carolina. The study provides insights on a topic that is little understood: how U.S. cities provide and manag
...
Recent federal legislation requires state highway agencies (SHAs) and local road agencies to utilize performance-based approaches in their pavement management decision-making processes. The use of a remaining service life (RSL) model would be one such performance-based approach that could facilitate the pavement management decision-making process.
...
The Texas Department of Transportation’s (TxDOT’s) engineering study methods for setting curve advisory speeds were recently updated to extend the guidance to more types of rural highways (e.g., four-lane highways and freeways). Additionally, the software suite used to implement the Global Positioning System (GPS)-based engineering study method for
...
It is widely acknowledged that early detection of material damage and timely rehabilitation can lead to a significant reduction in the lifecycle cost of asphalt pavements. This research investigates the capabilities of damage detection and healing of graphite nanoplatelet (GNP)-taconite modified asphalt materials. The first part of the research is
...
This study aimed to (i) identify and track external factors that are associated with all modes of transportation (i.e., auto, truck, transit, bicycle and pedestrian, aviation, rail, and seaport), (ii) understand the evolutionary and emergent nature of the Florida transportation system, and (iii) facilitate informed policy and decision making in tra
...
This manual provides guidance on how to use the cone penetration test (CPT) for site investigation and foundation design. The manual has been organized into three volumes. Volume 1 covers the execution of CPT-based site investigations and presents a comprehensive literature review of CPT-based soil behavior type (SBT) charts and estimation of soil
...
This project evaluates the most under-utilized but potentially the most useful ATSPM measure in decision making for left turn phasing at signalized intersections. Lack of data quality control or quality checks and a difficulty in using the currently presented measure on the website have been identified as shortcomings of the “left turn gap analysis
...
The 2014 Transportation Asset Management Plan calls for developing a method to annually track, monitor, and identify road segments that have been in poor condition for more than 5 years and consistently consider them when programming. In Minnesota, pavements are considered in poor condition when the ride quality index (RQI) is less than or equal to
...
This study investigated the feasibility of introducing AFVs into the Utah Department of Transportation (UDOT) fleet, and a proper framework was devised and tested with real-world data. A mixed-integer linear model was adapted from the literature and modified, allowing UDOT to determine which type of vehicle needed to be purchased and salvaged each
...
With specific regard to interstates in the rural area, Indiana Department of Transportation (INDOT) has expressed a need for research that sheds light on this Maintenance of Traffic (MOT) issue so the agency [INDOT and the contractor] can make informed decisions regarding the crossover sections versus the closure in one direction with detour roads.
...
While extensive procedures have been developed for the collection and dissemination of motor vehicle volumes and speeds, these same procedures cannot always be used to collect pedestrian data, given the comparably unpredictable behavior of pedestrians and their smaller physical size. There is significant value to developing lower cost, lower intrus
...
This report presents a case study for constructing aggregate subgrade improvement (ASI) layers using quarry by-product aggregates (QBA), a quarry mix of large primary crushed rocks (PCR) and sand-sized quarry fines. The construction took place at Larry Power Road in Bourbonnais Township in Kankakee County, Illinois, where the Illinois Department of
...
Integrated Corridor Management (ICM) systems offer the potential to manage both travel demand and network demand in normal and abnormal conditions. Traditionally, ICM is typically applied in an urban setting where multiple transportation modes are readily available. NCDOT has applied ICM principles, but in more rural applications where less modal a
...
In the United States, federal, state, and local governments are responsible for addressing their residents' transportation infrastructure needs. Similar to most State Department of Transportation (State DOTs), the South Carolina Department of Transportation (SCDOT) is responsible for owning, operating, and maintaining a large transportation system
...
Today’s vehicle navigation systems have limited ability to predict. The lack of coordination among different shippers and of information on the transport network make it difficult to predict changes in the transportation networks due to upcoming loads. The need for an intelligent freight assignment system becomes more urgent with the surge of techn
...
This research empirically investigates the need for, and the effective design and content of, a proposed mobile application that is targeted at pedestrians and cyclists in Fresno County. The differential effect of the proposed mobile app name and colors on the target audience opinions was examined. Further, app content and features were evaluated f
...
The Texas Technology Task Force was formed to help Texas Department of Transportation (TxDOT) to remain at the forefront of innovative transportation, by serving as a cross-functional advisory dedicated to providing guidance on essential strategies, innovation, and communication tools for emerging technologies. The Task Force, together with TxDOT,
...
Full-depth reclamation (FDR), a common strategy on rural roadways to reduce costs for materials and hauling, was validated to be a viable long-term and cost-effective option for urban and suburban asphalt pavement rehabilitation. These findings were published in two Minnesota Local Road Research Board studies from 2016. However, statewide applicati
...
This report summarizes the results of a research project that was conducted to evaluate the cracking resistance of aramid fiber-reinforced asphalt mixes used for resurfacing applications on local roads and compare it to that of polymer-modified asphalt mixes. This project was divided into two phases. Based on the results of laboratory study in Phas
...
Among the many approaches toward fuel economy, the adoption of electric vehicles (EVs) may have the greatest impact. However, existing studies on EV adoption predict very different market evolutions, which causes a lack of solid ground for strategic decision making. New methodological tools, based on Artificial Intelligence, might offer a different
...
Links with this icon indicate that you are leaving a Bureau of Transportation
Statistics (BTS)/National Transportation Library (NTL)
Web-based service.
Thank you for visiting.
You are about to access a non-government link outside of
the U.S. Department of Transportation's National
Transportation Library.
Please note: While links to Web sites outside of DOT are
offered for your convenience, when you exit DOT Web sites,
Federal privacy policy and Section 508 of the Rehabilitation
Act (accessibility requirements) no longer apply. In
addition, DOT does not attest to the accuracy, relevance,
timeliness or completeness of information provided by linked
sites. Linking to a Web site does not constitute an
endorsement by DOT of the sponsors of the site or the
products presented on the site. For more information, please
view DOT's Web site linking policy.
To get back to the page you were previously viewing, click
your Cancel button.