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.
Between 1985 and 1987, a total of 400 pedestrians were fatally injured in Virginia; more than half of the pedestrian fatalities occurred in an urban area of the Commonwealth. Because little research had been conducted on urban pedestrian fatalities in Virginia, the Virginia Department of Motor Vehicles requested that the Virginia Transportation Res
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The objective of this research was to evaluate low cost weigh-in-motion systems. The three systems evaluated were (1) a capacitance weigh mat system, (2) a bridge weighing system, and (3) a piezoelectric cable sensor system. All three systems have a two-lane capability. An evaluation was made of (1) the quality of the data, (2) the performance of t
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Asphalt rubber, which is produced by reacting asphalt cement and crumb rubber, is claimed to increase fatigue life and reduce rutting of asphalt concrete; however, the service life must be increased significantly to offset the additional coast of adding the rubber. In order to assess the performance of asphalt rubber mixtures and how effectively th
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Because of the number of incidents and the magnitude of their consequences, the Virginia Department of transportation made a concerted effort to ensure that incident management became a top priority and spearheaded an effort to start a statewide incident management program. This report documents that program. This program was concerned with the coo
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In the fall of 1989, the content and statutory/regulatory provisions for other states' driver improvement programs were examined. This was done by both surveying the driver improvement managers in the various states and by conducting an analysis of their statutes and, where possible, their administrative rules and regulations. It is clear from thes
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This study addresses the problem of queueing on highway facilities, wherein a large number of computerized methods for the analysis of different queueing situations are available. A three-tier classification system of the methodologies was used with the following categories: dedicated techniques, classical queueing theory, and simulation. A knowled
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Various geophysical electrical measuring techniques, i.e., spontaneous potential (SP) terrain conductivity meter (TCM), and conventional electrical resistivity/conductivity (ER), were tested to determine their effectiveness in detecting, delineating, and monitoring weak zones and layers along three slopes in western Virginia. In addition, the SP te
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The Transportation Planning Division (TPD) of the Virginia Department of Transportation uses an extensive amount of travel data in both its routine planning activities and its provision of data forecasts to other divisions. Travel data consist of such items as 24-hour and peak hour volume counts, turning movement counts, origin and destination surv
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The report has been prepared in response to a request from the Transportation Safety Administration of the Department of Motor Vehicles for data concerning the use of safety belts and child safety seats by the occupants of vehicles bearing Virginia license plates. In an effort to track changes in safety belt use as a result of various statutory ena
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In part 3 of a three-phase effort, the Virginia Transportation Research Council was requested by the Virginia Department of Transportation (VDOT) to develop a comprehensive risk management system to confront the threat of tort liability caused by transportation system defects. The first two phases of the project involved research into risk manageme
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This report provides the background for the development of a pavement management system for the paved roads of Virginia's secondary highway system. Included are descriptions of a study to develop an acceptable surface-condition rating system for surface-treated (chip-sealed) pavements, a pilot application of the system, and an assessment of the res
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This report presents a plan for a timber bridge initiative in Virginia. It addresses (1) the immediate and future potential for using timber in the replacement of many of Virginia's bridges, (2) the available timber resources in Southside Virginia, (3) the wood species best suited for use in Phase I of the initiative, (4) factors affecting the econ
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A detailed examination was made of 34 bridge decks, 11 to 30 years old, containing uncoated reinforcing steel. These bridges are located throughout Virginia. Cores were taken from each to evaluate the quality of the concrete with the objective of determining the relationship of concrete properties with the long-term performance of such bridge decks
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The Virginia Transportation Research Council was requested by the Virginia Department of Motor Vehicles to estimate the changes in statewide safety belt use that would occur if the state were to modify its current mandatory use law (HUL) to permit primary enforcement. In carrying out the project, a literature review and a review of all state HUL st
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This report on joint sealant materials for concrete pavement repairs is based on conversations with specialists from several states, the Federal Highway Administration, the Portland Cement Association, and the American Concrete Pavement Association, and on a review of the literature. It lightly covers material properties, costs, and the experience
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Expanded titanium mesh with a layer of precious metal oxides sintered around it has recently been introduced to fulfill the need for a durable anode in the cathodic protection (CP) of concrete bridge decks. In addition to being resistant to chemical attack, the titanium mesh (1) provides relatively high electrical redundancy, (2) requires minimal l
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During the construction of the I-295 cable-stayed bridge, an extensive array of mechanical strain gage points were installed in sections of the box girders, pylons, and piers. At each instrumented box girder section, five longitudinal gages were placed on the deck surface and three longitudinal gages were placed on the bottom flanges of the box gir
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This report first explains what a limited access highway is, then describes the benefits and advantages of limited access highways. As compared with highways with no control of access, limited access highways (especially those with full control) have the following benefits and advantages: greater capacity; improved safety; reduced fuel consumption;
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The report presents the findings of a study that investigated the opportunities for the future development, expansion, and operation of Virginia's rest areas and welcome centers through joint efforts of the Virginia Department of Transportation (VDOT), the Virginia Division of Tourism (VDT), and the private sector. The researchers examined rest fac
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