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.
This research project was undertaken to strengthen the knowledge in this area. The specific objectives were: l. To study methods of test for determining the clay content of concrete aggregates. 2. To determine the effects of clay content on the strength, shrinkage, and durability of concrete. 3. To relate these effects of clay on the properties of
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This paper reports physical effects of chemical admixtures on concrete and cement mortars, compares the variability of mortar tests with the variations encountered in concrete tests, and shows the degree of correlation of these tests with tests on concrete. The data presented provide a basis for utilizing a standard mortar for quality control tests
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Elastomeric bearing pads of five different materials with shape factors ranging from one to six were subjected to a series of three specific tests to determine and compare their respective load-deformation characteristics. Compression-deflection tests were conducted to determine short time load-deflection responses for solid pads and laminated pads
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The American Public Transportation Association is a nonprofit international association of over 1,500 public and private member organizations including transit systems and commuter rail operators; planning, design, construction and finance firms; product and service providers; academic institutions, transit associations and state departments of tra
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The purpose of this phase of investigation was twofold. 1. Correlation of freeze-thaw research results at the Texas Transportation Institute with ASTM Standard freeze-thaw results. 2. Develop preliminary durability acceptance criteria for concrete using synthetic aggregates based on freeze-thaw test. 1.2 Background- The research reported herein rep
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The objective of the project was to study experimentally the fatigue behavior of flange plates in welded beam sections as influenced by different residual stress distributions which are caused by different sizes of welds.
The National Academy of Engineering selected the subject, traffic safety, to be the theme of its spring symposium in April 1966. A comprehensive view of the current status of accident reporting, the legal environment, types and severity of injuries caused by different impacts, and the emergency services needed or available at the site of accidents
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This report is divided into two parts. Part 1 explains the need for railway classification yards, what they do, and how they do it. Part 2 presents a concept for a novel “folded two-stage yard” which embodies a back-and-forth approach to switching cars through a central switching area. Unlike existing yards that rely on either switch engines or gra
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This research was primarily designed for two purposes. The first objective was to investigate the feasibility of staggering working hours in Houston, Texas. The second objective was to evaluate the impact that staggered working hours of selected traffic generators would have on the morning peak period operation of the Gulf Freeway in Houston.
A study was begun in 1963 on the effects of right of way acquisition on the remaining portions of rural farms and ranches in Texas. This report presents some preliminary findings developed from personal interviews with operators of land affected by right of way acquisition for Interstate 45 in Madison County. Information gathered from the operators
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