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.
Degradation of bridge components is an ongoing challenge facing the South Carolina Department of Transportation (SCDOT). This report addresses current and evolving technologies to assist with condition assessment of bridges and culverts while increasing worker safety. Technologies investigated include aerial drones, robotic crawlers, and jetyaks. I
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The aim of this script is to automate the process of directed network graph formation, i.e., creation of incidence matrix, node adjacency matrix, and map the sensors to appropriate links. The data used for creating the freeway network is obtained from open street maps, whereas, the data for sensors is obtained from PeMS. The results of the algorith
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Utah Department of Transportation (UDOT) in partnership with Federal Highway Administration (FHWA) hosted a two-day Virtual Peer Exchange on June 1 and 2, 2020. This peer exchange was originally planned to be a three-day in person meeting. To use more innovative platforms, this meeting was shifted to a virtual/ online platform and condensed to two
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An often-overlooked aspect of winter maintenance operations is snowplow operators’ risk of a crash. The goal of this project was to examine key causes of collisions involving snowplows, identify defensive driving strategies snowplow operators can use to prevent crashes, and develop two comprehensive and engaging snowplow operator training modules o
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In today’s world, there is a significant amount of investigation regarding how to efficiently distribute loaded containers from the ports to the consignees. However, to fully maximize the process and become more environmentally friendly, one should also study how to allocate the empty containers created by these consignees. This is an essential par
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The use of deicing salts on highway bridges has decreased the service life of bridge decks due to the accelerated corrosion of the steel reinforcement. The use of Glass Fiber Reinforced Polymer (GFRP) in bridge decks as a means of corrosion-mitigation has been met with some success; however, GFRP is a linear-elastic material that does not exhibit a
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Megaregions are defined as connected networks or clusters of metropolitan areas where the U.S. population and employment growth is increasingly concentrating. Fashioning strategies and new institutional arrangements to better manage growth in these tightly connected metropolitan areas has been identified a crucial challenge calling for new thinking
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The presence of Italian ryegrass on Georgia roadsides reduces motorist site visibility and increases maintenance costs for the DOT. Herbicide selection is limited on roadsides due to economics and the susceptibility of roadside turfgrasses to injury. Consequently, agronomists often apply the same chemistries every year without rotating herbicide mo
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High Friction Surface Treatments (HFSTs) are pavement surfacing systems that provide skid-resistant, and deck sealing properties not typically associated with conventional materials. The spot application of a thin layer of durable, high friction aggregates as a topping on specially engineered resin or a polymer binder affords long-lasting traction
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Most mid-size and large open-campus universities have courtesy shuttle or bus service as an important mode of transportation around campus and in nearby vicinities. Given on-campus traffic conditions, traffic congestion between classes, the nature of short-distance trips within or around campus, and difficulty with finding parking spaces, automated
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At the conclusion of road construction projects, an erosion control product (e.g., blankets, spray mulch) is installed to reduce soil loss and promote plant growth. Wildlife, such as snakes (suborder Serpentes), are prone to entanglement in erosion control blankets (ECBs) that contain polypropylene mesh with fused apertures. Previous reports have n
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The I-35W St. Anthony Falls bridge was highly instrumented with over 500 sensors to verify design assumptions, serve as a testbed to examine bridge sensing techniques, and evaluate the effectiveness of different bridge monitoring strategies. The instrumentation deployed on the bridge to investigate the structural behavior included vibrating wire st
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This report presents the latest improvements in a recently developed nondestructive testing (NDT) technique for early detection of various flaws such as corrosion, delamination, and concrete cracking in reinforced concrete (RC) bridge decks. The method, named Ultrasonic Guided Wave Leakage (UGWL) method by the developing authors, involves use of in
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Dynamic Messaging Signs (DMS) and Rural Intersection Conflict Warning Signs (RICWS) are roadside signs that feature much larger and heavier signs than are typically placed on their respective support systems. The excess weight and size of these signs, in conjunction with their breakaway support systems, introduces vibration problems not seen in the
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This project evaluated the influence of anti-strip additives on the durability and moisture susceptibility of granite-based open-graded friction course, referred to as FC-5 asphalt mixtures. The laboratory testing involved two granite-based FC-5 mixtures containing 1% hydrated lime (by weight of aggregate), 1% hydrated lime plus 0.5% liquid anti-st
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Missouri Department of Transportation (MoDOT) was one of the early adopters of the Mechanistic-Empirical Pavement Design Guide procedure and completed the local calibration using the research grade software in 2009. The emphasis in 2009 was on establishing testing and field data collection programs, and calibrating for new designs as adequate perfo
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The primary objective of this project was to develop an integrated freeway control system that can effectively guide the timely activation of key operation components either concurrently or sequentially in contending with daily recurrent congestion. This project produced four traffic models for highway agencies to overcome various constraints exist
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Loose anchor nuts on foundations of highway ancillary structures have been implicated in numerous structural failures in the Transportation industry for several decades. Loose anchor nuts can increase the stresses in the anchor rods, which can lead to potential collapse of the ancillary structure under wind loads. The exact cause of anchor nut loos
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University of South Florida. National Center for Transit Research (U.S.)
2020-06-01
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This study examines issues of women’s safety and security on public transit. The first section of the report provides background information and synthesizes recent literature on the topic of women’s security not only when using (or working in) public transit, but while traveling in any public space. The second section of the report analyzes transit
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The Louisiana Department of Transportation (DOTD) has been collecting geotechnical data in the District labs for many years in a variety of different formats, and in many cases, District personnel are inputting the same data repeatedly in different systems. Accessing this data and combining it with new data for the purpose of design, analysis, visu
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