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 Minnesota Department of Transportation (MnDOT)’s 511 Traveler Information System. It describes a concept to improve the provision of traveler information to active transportation users. The concept advocates for the inclusion of traveler information for all transportation modes, emphasizing the needs of active transportation users, including cy
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Minnesota. Department of Transportation. Research Services & Library
2025-06-01
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MnDOT research has developed a modeling tool that identifies the bus route segments that would benefit most from the installation of a dedicated right of way (ROW) for buses. Transit service reliability is one of the most requested service improvements. By implementing a transit ROW where needed most, MnDOT can improve transit reliability and bette
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The Minnesota Department of Transportation (MnDOT)’s 511 Traveler Information System. It describes a concept to improve the provision of traveler information to active transportation users. The concept advocates for the inclusion of traveler information for all transportation modes, emphasizing the needs of active transportation users, including cy
...
Vehicle automation may change traffic flow dynamics. This will also impact the control of traffic flow via infrastructure-based systems such as ramp metering control. In this work the authors investigated the impact that different levels of automation and connectivity will have on ramp metering control, and proposed modifications to existing ramp m
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The primary goal ofTRC2201 was to enhance the durability of asphalt pavements in Arkansas. This was accomplished through two steps: exploring extreme scenarios with lab mixtures and comparing eight field sites. Further analysis was conducted using Pavement ME and a life-cycle cost analysis. In the extreme scenario, air voids decreased as Pb and N l
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Minnesota’s taconite (iron ore) mining industry can provide adequate or comparable skid resistance performance to calcined bauxite in high friction surface treatment (HFST)-type applications. Six pavement test sections approximately 1/10th of a mile (160 meters) in length were established at a low volume road location northwest of Duluth, Minnesota
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The scope of this study included a thorough evaluation of the short-term and long-term performance of Spray-on Rejuvenators (SORs) to assess their effectiveness in extending asphalt pavement life. Laboratory testing on cores extracted from field included a modified Bending Beam Rheometer (BBR) to measure creep stiffness at different temperatures (2
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School bus stop-arm violations represent a direct and serious safety risk to children boarding and exiting school buses. Mitigating these dangerous events with preventative measures, education, and proactive enforcement requires a deep understanding of these events. The goal of this study is to better understand the school bus stop-arm violation re
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The objective of this research was to support sustainable procurement of concrete pavements by linking materials-level global warming potential (GWP) to the project level. Infrastructure owners require reliable environmental product declarations (EPDs) and methodologies for integrating GWP into the procurement process to ensure equitable decision-m
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Alkali-silica reaction (ASR) remains a significant durability concern in concrete pavements, leading to internal cracking, surface deterioration, and loss of ride quality. Although preventive measures have reduced ASR in new construction, pavements built in Minnesota in the 1980s and 1990s continue to exhibit distress. This study evaluates maintena
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This Research Summary is part of the final deliverable for Report 2025-24, "Development of a Process to Lower Global Warming Potential of Construction Materials."
This Research Summary is part of the final deliverable for Report 2025-29, "Sustaining Performance of ASR-Affected Pavements: Effective Practices and Insights."
As turtle populations decline worldwide, there is an increased need for rapid and reliable monitoring of species to meet the need of increased regulatory burdens. The use of environmental DNA (eDNA) as a monitoring tool for rare species is becoming increasingly common, but there is a still a need to optimize methods in the laboratory and the field
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This Research Summary is part of the final deliverable for Report 2025-30, "Pavement Marking/Colored Pavement Friction Differential and Product Durability."
This report presents the Smart Signal Performance Monitor (SSPM) system, developed to enhance intersection safety in Florida. The SSPM utilizes Automated Traffic Signal Performance Measures (ATSPM) to provide data-driven signalization recommendations. Raw ATSPM data is transformed into performance measures like Signal Phasing and Timing (SPaT) metr
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Despite the presence of properly signed and well-located runaway truck ramps, crashes involving trucks with overheated or otherwise failed brakes continue to occur downhill from the ramp locations. A recently deployed experimental truck warning system on Wolf Creek Pass on westbound SH160 shows some promise of effective crash reduction. The intent
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Recent coal-fired power plant closures resulted in limited availability of fresh fly ash in some regions of the United States of America. This combined with stricter environmental regulations has led to national specifications being modified to allow the use of coal bottom ash in addition to coal fly ash as a supplementary cementitious material in
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This study investigates the self-healing potential of concrete with quicklime (CaO) aggregates, inspired by Roman concrete, to extend the service life of transportation infrastructure. Three concrete mixtures – control (0% quicklime), 2% quicklime (C-Q 2%), and 4% quicklime (C-Q 4%) – were tested for fresh properties, mechanical performance, durabi
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