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.
The project and risk management policies and strategies used by other DOTs in the country were evaluated. The purpose is to gain insight into how they measure and manage project development and delivery, and ultimately obtain ideas to improve ODOT’s own project management methods.
In previous research, investigators developed and deployed two warning systems, including MN-QWARN, which was installed on a segment of Interstate 94 (I-94) with a historically high crash rate. This system targeted shockwaves or initial stages of congestion based on the understanding that not all congestion events create high risks for crashes. Cer
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The primary objectives of this study are to develop a detector performance monitoring system for both off-line and on-line applications, and to implement such a system for the Eastern Shore region’s current and proposed sensors, including: evaluate the data quality and reliability of the six sensors deployed in the Eastern Shore region; assess the
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The Ohio Department of Transportation (ODOT) is constantly looking for ways to reduce maintenance costs following construction using native seed mixes while ensuring all Stormwater Pollution Prevention Plan (SWPPP) requirements are met. Davey Resource Group “DRG” was contracted by ODOT to develop seed mixes for various habitats and research appropr
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The objective of this research project was to develop new curve numbers for four land treatments, bare soil, gravel, vegetation, and porous HMA, on top of subsoils with a series of hydraulic conductivities, typical of NJDOT highway projects.
Ultra-High-Performance Concrete (UHPC) is an excellent material for bridge construction due to its exceptional durability and superior mechanical properties. Several Departments of Transportations (DOTs), including NDOT, have limited the use of UHPC in bridge construction to joints and connections between bridge components due to the relatively hig
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Artificial lighting at night alters natural patterns of light and dark in ecosystems and includes chronic or periodic illumination, unexpected changes in lighting, and direct glare that can have serious implications for ecological systems, such that it is increasingly referred to as “ecological light pollution”. ALAN occurs at an extent and magnitu
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The goal of this research is to complete the following objectives: • Inventory relevant transportation investment plans for New Jersey, including capital programs for NJDOT, NJ TRANSIT, NJTA and SJTA. • Coordinate amongst all SCIS stakeholders, including key collaborators at NJDOT, NJTA, SJTA and NJ Transit. • Draft an SCIS document that meets all
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Innovative or nontraditional transportation programs and platforms have emerged for rural communities, largely fueled by digital technology. Public-private partnerships, car- or bike-shar?ing, and other local networks offer promising solutions to meet rural transit needs more equitably and efficiently. In addition to benefiting underserved populati
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Concrete overlays of full depth reclamation (FDR) are a pavement rehabilitation option involving reclamation of existing pavement layers while providing a new concrete surface to the roadway. This report reviewed nine concrete overlays of FDR that have been constructed in three states since 2006. Design and construction details were collected for e
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Sliplining is a method used by transportation agencies to rehabilitate deteriorated culverts. In recent years, ODOT discovered a number of sliplined culverts that did not have their annulus void spaces completely filled. Such culverts experience distortion and settlement as well as reduced structural capacity. Field inspections of several sliplined
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The Ohio Department of Transportation (ODOT) is constantly looking for ways to reduce maintenance costs following construction using native seed mixes while ensuring all Stormwater Pollution Prevention Plan (SWPPP) requirements are met. Davey Resource Group “DRG” was contracted by ODOT to develop seed mixes for various habitats and research appropr
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New Jersey Department of Transportation (NJDOT) is required to quantify and mitigate the stormwater impacts of certain roadway projects. Acceptable runoff calculation methods include the Natural Resources Conservation Service Method and the Rational Method. Existing coefficients are often insufficient for representing land treatments utilized in ro
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Pedestrian deaths are at a 30-year high nationally, accounting for 16% of total deaths in 2018 and far exceeding the previous decade of 12%, a trend mirrored in Minnesota. Previous research found an increase in local and citywide yielding at unsignalized crosswalks following an engineering and high-visibility enforcement program in Saint Paul, Minn
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Although crack sealing is one of the common tasks that maintenance crews at ODOT county garages frequently conduct, it can often be challenging as it is weather-dependent, slow-paced, and labor intensive. In addition, frequent breakdowns of equipment can cause significant downtimes. Crack sealing maintenance crews are also exposed to many hazards i
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This technical report presents results from the 2021 National Survey of the Use of Booster Seats (NSUBS), the only probability-based nationwide child restraint use survey in the United States that observes restraint use and interviews an adult occupant to collect age, gender, height, weight, race, ethnicity, and other data. NHTSA’s National Center
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Many roads and highways exist close to streams that exhibit lateral instability (bank erosion). Conventional practices are to armor such locations, and these solutions are expensive, do not provide ecosystem value, and result in high mitigation fees. Natural channel design structures, such as engineered log jams, offer a greener, less expensive alt
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Researchers at the Texas A&M Transportation Institute (TTI) designed and tested a Manual for Assessing Safety Hardware (MASH) Test Level 3 (TL-3) compliant guardrail transition system (hereafter referred to as Transition) that enables transitioning and terminating the ends of the Texas Department of Transportation MASH TL-4 guardrail system with MA
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This study explores the effects of increases in online activities (such as telecommuting and online shopping) as well as shifts toward electric vehicles on transportation revenues for the District of Columbia (DC). The analysis is based on (1) a review of the literature and state of practice regarding online activities, trends in vehicle fleet mix,
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In general, tunnels are designed with an abundance of safety regarding structural integrity, however, there can be uncertainty related to structural performance after a fire event. The residual condition of a tunnel after a fire is dependent on fire intensity and duration. The goal of this study is to correlate visual and material characteristics o
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