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.
Proper application of pavement markings plays an important role in enhancing the safety of roadway users. The purpose of this study is to carefully synthesize information on the usage of various types of pavement marking materials (including but not limited to the types of marking materials and quality control approaches, types of specifications, a
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The purpose of this reference guide is to provide local agency staff a resource on four intelligent warning devices (active warning signs) that includes a general explanation on the use of the sign and their effectiveness, recommended installation protocols, alternative countermeasures to consider and maintenance considerations. With this guide, ag
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Florida struggles with a serious imbalance between inbound and outbound freight. Statistics from the Federal Highway Administration reveal that the total freight tonnage entering Florida is nearly double the tonnage leaving the state. This imbalance suggests that many trucks and other modes of freight transportation leave the state empty or only pa
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The primary objective of this research is to develop intersection capacity parameters that are specific to Louisiana conditions. More specifically, the research aims to estimate the saturation flow rate for selected signalized intersections and analyze critical headway and follow-up headway at stop-controlled intersections.
To address challenges related to teen driver safety, Kentucky adopted a simple graduated driver licensing (GDL) program in 1996 and further expanded it in 2006 by adding an intermediate licensing phase, requirements for supervised practice driving, and instituting restrictions on passenger age. Despite GDL programs having been adopted throughout th
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The trucking industry plays a critical role in freight transportation in the United States. One major problem commonly recognized across the country is inadequate truck parking supply because existing truck parking facilities are struggling to meet the demand of increasing numbers of trucks on the road. Lack of parking spaces and real-time parking
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Ice roads and bridges across rivers, estuaries, and lakes are common transportation routes during winter in regions of the circumpolar north. Ice thickness, hydraulic hazards, climate variability and associated warmer air temperatures have always raised safety concerns and uncertainty among those who travel floating ice road routes. One way to addr
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Permanent capacity expansion, such as adding new lanes, is no longer a viable strategy to address traffic congestion in California; hence, ITS (Intelligent Transportation System) strategies, such as part-time use of the shoulder as a travel lane, need to be explored. The use of the shoulder as a travel lane during peak traffic hours has limited app
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Concrete diamond grinding on pavement projects generates a nonhazardous waste byproduct called concrete grinding residue (CGR). CGR has known cementitious characteristics that suggest a latent use as a soil-stabilizing amendment, especially for poor and problematic soils. In this study, Western Iowa loess soil was amended with CGR and subjected to
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The imbalance between increasing travel demand by passengers and the stagnant growth of transportation infrastructure capacity, particularly in urban areas, has caused dramatic impacts on traffic condition, the environment, public health, and energy consumption. Consequently, the development of sustainable and resilient transportation systems has b
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Objectives are to evaluate different reclamation seed mixes along roadsides over twenty years to determine the rate of reseeding success and better define combinations of species and site variables that contribute to successful revegetation outcomes. Sites and seed mixes will be evaluated for resilience to invasion by high impact species such as ch
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State transportation agencies have limited funding to deliver multimodal transportation programs that address the needs of all users. To allocate project funding in an impartial and objective manner, many agencies have adopted data-driven scoring systems that are used to evaluate the merits of proposed capital improvement projects. The Kentucky Tra
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A short storage space railroad crossing has insufficient distance between the crossing and the highway intersection stop line to safely store a design vehicle. The current Michigan Department of Transportation (MDOT) project (OR 19-032), led by Texas A&M Transportation Institute (TTI), aimed to provide guidance on these crossing types. This study e
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ORIL is a program designed to provide practice-ready solutions to real-world issues facing Ohio’s local transportation system through research. It’s a multi-organizational collaborative effort to improve the transportation network in Ohio’s counties, townships, cities and villages.
The goal of the predictive safety tool research is to help New Jersey meet its safety targets and reduce transportation fatalities and serious injuries on all public roads, including non-State-owned roads. The use of predictive safety tools can help reach that goal by expanding the data and capability of the NJDOT to conduct safety analyses that pr
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The goal of this project was to identify sites and counties that have the greatest need for empty backhauling relief in Florida, and then evaluate high-performing manufacturing industries that might work for those areas. If manufacturing could increase in those places, empty backhauling could likewise be reduced.
Development of new air vehicles types (e.g., personal air vehicles, urban taxis, etc.) have led to a proliferation of Vertical Takeoff and Landing (VTOL) vehicle concepts including electric vehicles, many of which are well funded and are in various stages of prototype development and testing. These vehicles almost exclusively feature fly-by-wire (F
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The primary objective of this study was to assess the challenges and opportunities associated with the provision of appropriate infrastructure to support electric vehicle (EV) operations and electrification across Indiana. A secondary objective of this study was to develop a strategic plan for the Indiana Department of Transportation (INDOT) that o
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United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
2023-01-01
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This research note examines seat belt use in 2022. The national estimate of seat belt use by adult front-seat passengers in 2022 was 91.6 percent, a record high although not statistically different (at the 0.05 level) from 90.4 percent observed in 2021. The seat belt use rate estimate represents the percentage of occupants who are belted during an
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The Digital Trust for Places and Routines (DTPR) open-source standard was tested as part of a Pedestrian Safety Technology Pilot Sandbox project rolled out by DDOT and their consultant. The DTPR standard was an effective tool for gathering and organizing privacy and data collection related information about each technology that was deployed as part
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