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 use of reclaimed asphalt pavement (RAP) has economic and environmental impacts. This report investigates the prospective use of RAP in preservation treatments (mainly chip sealing and microsurfacing) in Illinois. A review of the current state of knowledge and practice was conducted. The economic and logistic feasibility of using RAP in preserva
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This project uses mixed methods to examine the systemic causes and consequences of the construction of Stockton, California’s Crosstown Freeway and of urban redevelopment for Asian Americans communities. Stockton underwent spatial restructuring in the decades after the Second World War, and state and local government contributed and responded to th
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Although new construction or replacement of bridges is many times in the best interest of the traveling public, high construction costs and potentially lengthy project delivery dates are hard to avoid. Using prefabricated bridge elements and systems (PBES) allows for reduced construction times and quicker turnaround times using Accelerated Bridge C
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Asphalt pavements deteriorate from temperature cycling, moisture, oxidation, and loading-related distresses. Pavement preservation is critical in maintaining the functional and structural integrity of roads and extending pavement life. Surface treatments can prevent or restore the aging effects by rejuvenating and/or sealing the pavement’s surface,
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The use of Ultra‐High‐Performance Concrete (UHPC) is gaining popularity for bridge applications in North America. UHPC has been used both in the construction of new and retrofitting of existing bridges. In this research, a novel use of UHPC as a concrete jacket for retrofitting of plastic hinge zones in cast‐in‐place and precast piers is proposed.
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This report provides an updated implementation plan or Road Map for implementing the AASHTO Pavement ME Design (PMED) software for the Idaho Transportation Department (ITD). The initial Road Map to implement the PMED software was published in 2014. This document is an update and continuation of ITD’s plan based on the completed activities between 2
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The objectives of this research were to construct a full-scale MSE wall with an unyielding condition and measure the resulting internal earth pressures. In particular, the goal of the project was to determine whether design should be conducted under assumed at-rest conditions, or somewhere between at-rest and passive pressure.
The objectives of this research were to synthesize decades of research and practicum surrounding fiber orientation factors for UHPC and analyze the rationale behind the standards set for UHPC design by several countries that have implemented guidelines for its use.
In this study, we use the concept of “sidewalk ecologies” to highlight the complex interaction between spatially situated social and material features of sidewalks that influence youth mobility. We use a range of interdisciplinary strategies, emphasizing youth-centered research methods and mapping to capture a rich portrait of the independent trave
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Chloride deicers have been applied by the Oregon Department of Transportation (ODOT) to Interstate Route 5 (I–5) from the Oregon-California border north to mile marker 10 for several years in the high-elevation area known as the Siskiyou Pass. Magnesium chloride (MgCl2) and sodium chloride (NaCl) are applied to keep the interstate highway safe for
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The purpose of this research was to examine crashes along higher speed roads (speed limit of 45 mph or more) excluding freeways, at signalized and unsignalized locations, determine predominant causes of these crashes, and to identify countermeasures for these crashes. Assessment of high crash corridors included an examination of the number of crash
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The U.S. Geological Survey, in cooperation with the Oregon Department of Transportation (ODOT), evaluated the effects of cold-weather chloride deicers (road deicing chemicals) on groundwater quality, with a focus on chloride, near the Siskiyou Pass in southwestern Oregon. The study covered the period during July 2018 through February 2021. Between
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The U.S. Geological Survey (USGS) Central Midwest Water Science Center (CMWSC) completed a report (Over and others, 2023) documenting methods for peak-flow frequency analysis in Illinois following Bulletin 17C guidelines. The methods are used to provide estimates of peak-flow quantiles for 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exc
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The U.S. Geological Survey Central Midwest Water Science Center completed a report (Over and others, 2023) documenting the methods, results, and applications of an updated flood-frequency study for the State of Illinois. This data release contains data related to the analysis completed to determine peak-flow quantiles (flood frequency estimates) at
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In this article, we describe a new method for detecting global navigation satellite system (GNSS) spoofing using an inertial navigation system. We specifically address the most difficult-to-detect scenario, in which a spoofer replicates the authentic GNSS signal with only additive errors due to the spoofer’s uncertainty in knowledge of the target’s
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Accurate modeling of stress-strain characteristics of geomaterials plays a significant role in determining the achievable design life of roadways (e.g., granular roads and paved roads). Currently, the geomechanical characteristics of these materials are obtained from standard laboratory tests such as California Bearing Ratio (CBR) and standard resi
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Recent hurricanes and other extreme events have resulted in substantial damage to North Carolina’s transportation infrastructure. In some cases, the same locations have been damaged multiple times, but the amount of damage differs, which suggests that DOT strategies were effective. However, without a detailed quantification of the performance diffe
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Low-volume roads (LVRs) are an integral part of the rural transportation network providing access to remote rural areas and facilitating the movement of goods from farms to markets. These roads pose unique challenges for highway agencies including those related to safety management on the highway network. Specifically, traditional network screening
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Car access is practically a necessity to get around in rural areas of the United States. Yet approximately 4% of rural residents or 4.3 million people do not have a car. Despite important rural–nonrural differences in the built environment and how people travel, research on rural mobility disparities by car access is limited. This paper addresses t
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Two types of energy dissipation devices at circular culvert outlets were investigated: full-length weirs and staggered weirs. Related literature was reviewed; a model broken-back circular culvert and dissipation basin was built; instrumentation was installed to measure discharge, piezometric head, and velocities; and four sizes of full-length and s
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