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 study presents a method to estimate fare payment compliance within the Massachusetts Bay Transportation Authority bus system using only automatically collected data from the Automated Fare Collection and Automated Passenger Counting systems. Data from over 787,000 passenger boardings were used to identify patterns of fare system non-interactio
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Sealers and coatings protect concrete bridge substructure elements from chloride-induced corrosion and extend the useful life of existing bridges. Their application is a common practice by the Texas Department of Transportation (TxDOT). Although concrete-penetrating surface treatments, Type X waterproofing, silicone resin paint, or opaque sealers a
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The Transportation and Autonomous Systems Institute (TASI) of Purdue University Indianapolis (PUI) and the INDOT Traffic Management Center worked together to develop a system that monitors traffic conditions using INDOT CCTV video feeds. Computer vision-based traffic anomaly detection has been studied for the past 20 years, and a thorough state-of-
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Regular inspection of transportation assets is essential to maintain their optimal condition and functionality. Our previous UDOT-funded project (Contract No. 22-8099, Report No. UT-22.24) demonstrated significant promise of artificial intelligence in identifying various transportation assets through a mobile phone. However, the initial project was
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Cementitious fireproofing has become an essential technique for safeguarding tunnel infrastructure against fire-induced damage, principally by providing a thermal barrier between flexural members and a fire event. Although fireproofing is extensively employed across different sectors, its specific utilization and efficacy in tunnel scenarios is ina
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This research aimed to assess bridge behavior under terragator-type implements of husbandry (IoH) with 25 kip axle loads. The key objectives were as follows: 1. Identify current in-service terragator-type legal vehicles per Iowa Code 321.463.a(1)(2). 2. Perform live load tests of bridges using terragator vehicles to determine actual live load distr
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Live load field tests of bridges were carried out using certain implements of husbandry (IoH) to observe the transverse load distribution and the dynamic impacts. A finite element (FE) analysis of the field-tested bridges was performed. The strain data from the FE analysis were validated with the field test data to establish an FE analysis method f
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This study investigated the viability of using crowdsourced data sets, specifically segment speed data (SSD) and connected vehicle data (CVD), for providing real-time traffic information to the public. After a literature review and interviews with state department of transportation personnel were conducted, the study focused on work zone queue warn
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This study investigated the viability of using crowdsourced data sets, specifically segment speed data (SSD) and connected vehicle data (CVD), for providing real-time traffic information to the public. After a literature review and interviews with state department of transportation personnel were conducted, the study focused on work zone queue warn
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E-commerce services and facilities have the benefits of bringing new employment opportunities to communities and meeting consumer needs, but they also attract heavy traffic, which results in congestion and negative environmental and economic repercussions. This project offers a new lens for studying future e-commerce facility siting, considering cu
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Conventional bridge deck overlays made with high-performance concrete (HPC) and low-slump dense portland cement concrete (PCC) generally require a 72-hour wet curing time before they can be opened to traffic. Shorter opening times are desired to reduce the high cost of traffic control for heavily traveled urban highways. To meet this need, high ear
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The goal of this project was to improve asset management through the implementation of Risk-Based Inspection (RBI) practices. This project studied risk-based processes for developing extended inspection interval policies for bridges. Prior tasks in the research included Reliability Assessment Panels from six states developing risk models for bridge
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One of the most environmentally friendly methods to recycle scrap tires is by shredding them into tire derived aggregate (TDA). TDA possesses desirable properties for various civil engineering applications and has been successfully used as fill material in numerous projects. To address the limitations of previous studies, 27 direct shear tests were
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The Manual on Uniform Traffic Control Devices (MUTCD) specifies the use of yellow sheeting for pedestrian or bicycle signs and fluorescent yellow-green (FYG) for school signs, with an option for the use of FYG sheeting for pedestrian or bicycle warning signs. However, switching from yellow or fluorescent yellow (FY) to FYG for pedestrian and bicycl
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This report addresses a gap in the literature by presenting the results of large-scale shear and compressibility testing of soil classified as clayey gravel and sand soil mixed with different percentages and types of TDA.
For an organization to develop a sustainable strategy that supports technical capacity, workforce retention, and innovation, it is essential to develop a strong framework for knowledge management (KM) both within individual divisions as well as organization wide. For state departments of transportation (DOTs), KM has become a topic of increasing ur
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Micromobility has become increasingly popular in cities across Florida and the nation, offering a convenient, flexible, and accessible alternative for short-distance travel, particularly for first- and last-mile transportation. However, most areas of Florida and even the nation currently lack a framework and established practices for micromobility
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On October 13–15, 2024, nearly 170 representatives of government, private sector consulting firms and companies, non-profit and advocacy groups, and universities joined the 2024 UCLA Lake Arrowhead Symposium on Mega Events, Major Opportunities. This report summarizes the discussions, lessons learned, and action items from the convening. Attendees h
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Commercial motor vehicle (CMV) drivers who engage in federally prohibited activities such as not wearing safety belts, using hand-held mobile phones, or texting while driving endanger themselves and imperil the well-being of everyone who occupies the surrounding roadway environment. Unfortunately, conventional CMV inspection routines fail to detect
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This report details the evaluation of a field study of the perpetual pavement concept. Seven test sections were instrumented on WAY 83 each with a specific build up to allow for a comprehensive examination of the effect of adding High Polymer to an asphalt mix. Sensors were installed in the test sections, including strain gages, temperature sensors
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