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.
Research Project 0-7027 developed an accelerated mix design procedure for cement-treated base materials, with attention to test turnaround time and inclusion of moisture conditioning. This project found that the indirect tensile (IDT) strength method with a 72-hour accelerated cure (where specimens are sealed at 104°F) followed by 24-hour moisture
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The objective of this project is to understand the trip patterns and socio-economics of customers who use the NLR. In addition, we seek to understand the characteristics of those exiting from I-280 (at Exit 13), near the Orange St. station and determine whether Orange St. could serve as an intermodal transfer site. Secondly, we provide an analysis
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This Research Summary is part of Report 2024-01, "Performance Monitoring of Olmsted CR 117 and 104 and Aggregate Base Material Update," published March 2024.
The New Jersey Department of Transportation (NJDOT) engaged Cambridge Systematics (CS) to perform research on recent changes to the Federal and State regulations that govern commercial vehicle size and weight limits in New Jersey, assessing “best practice” communication techniques to share information with industry, and developing updates to NJDOT’
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The objective of this research was to develop both short- and long- term pavement performance and deterioration models that can be used to estimate future pavement conditions and smoothness using ANN modeling. Specifically, the short-term models were for the prediction of 2- and 4-year future pavement surface cracking percentages for the current Lo
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High mast illumination poles (HMIPs) experience cyclic loading from wind, which can cause large deflections at the top of the pole, amplified by the mass and geometry of the luminaire. As a result, large stresses can develop at the handhole and base plate connections. These details are especially susceptible to fatigue cracking due to the combinati
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Vehicular communication allows vehicles to interact with road users, roadside infrastructure, and cloud-connected devices. It holds a crucial position in modern transportation systems, impacting both fundamental and advanced aspects and enhancing traffic safety and efficiency. C-V2X is a wireless communication technology that uses cellular networks
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To address climate change mitigation goals, alternative concrete paving mixtures are being investigated that are claimed to have a lower global warming potential (GWP) at time of construction with equal or better long-term performance compared to conventional concrete paving mixtures currently in use by the Minnesota Department of Transportation (M
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This report presents two major aspects related to evaluating timber bridges with nondestructive testing: i) laboratory experiments and ii) field applications. The first part of the report discusses the degradation processes and resulting outcomes of structural timber, Douglas Fir, that is broadly used for bridge construction. In accordance with the
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This Transportation Research Synthesis (TRS) investigates potential strategies for equitable fee structuring among motorists in Minnesota as adoption of electric vehicles (EVs) continues to accelerate. To examine funding structures that could address revenue shortfalls due to EV deployment, this TRS summarizes other states’ approaches to capturing
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Currently the scope or cost of wildlife vehicle collisions (WVCs) in New Hampshire is not understood. Citizens die every year in New Hampshire in collisions with wildlife. There is also a cost in terms of emergency response and property damage from the collisions. Records of collisions with wildlife are not held in one easy to access central locati
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Bridge decks are prone to various types of cracking due to a combination of factors, including traffic loads, temperature variations, moisture, and chemical exposure. This report tackles the critical issue of bridge deck cracking by systematically dissecting the problem, exploring various crack types, and emphasizing the crucial inspection and cate
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The objective of this research was to analyze and compare the performance of asphalt pavements constructed using specifications from the 2006 SSRB to pavements built under the 2016 SSRB and its accompanying special provision 8/18.
The purpose of this research is to identify Rural Planning Organizations (RPOs) in the State of Illinois and current practices in rural transportation planning. The research will inform IDOT on the functioning of these organizations, their sources of funding and identify gaps and redundancies in the state. The objective of this research is twofold:
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Texas Department of Transportation. Research and Technology Implementation Office
2024-03-01
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MPEG
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 impacts. A University of Texas Center for Transportation Research project recently completed research on fut
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The Louisiana Department of Transportation and Development (DOTD) currently utilizes pavement performance prediction models in treatment selection and budget planning. These models are solely based on the non-linear curve-fitting regression of existing pavement condition data available in its pavement management system (PMS) database. The objective
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In this research we examined whether a multi-modal park and ride lot at the Newark Light Rail (NLR) Orange St. station would attract users, given its proximity to a major off-ramp (exit 13) from I-280 for travelers accessing downtown Newark. We collected customer data from NLR customers using an onboard survey and obtained 920 usable responses. Thi
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Automated, connected, electric, and shared (ACES) technologies are rapidly evolving and will continue to impact the development of vehicles, infrastructure, communities, commerce, and the economy. Based on the Florida ACES transportation system roadmap for Florida developed in Phase I, this project aimed to engage with private industries to leverag
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Reliable intersection-traffic data are essential for transportation planning, operations, and safety. The City of Bismarck relies on targeted short counts, which is the predominant, albeit outdated, type of intersection traffic data collection. The city recently updated its signalized intersection equipment, hardware, and communications, making it
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