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.
Introduction. The Palletized Load System (PLS), a nondevelopmental i tern configured to meet the Army's required operational land transportation capabilities, is a highly mobile, dieselpowered, 16.5-ton truck with all-wheel drive capability. Its 16.5-ton capacity offered the Army an opportunity to improve the efficiency of ammunition distribution t
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The Oregon State Highway Division (OSHD) currently uses the Vacuum Extraction procedure for acceptance testing for asphalt content of asphaltic concrete. Because of the concern with Chlorinated solvent, i.e. safety, disposal, and expense, OSHD has investigated the potential of Nuclear Asphalt Content Gauges. In June 1988, OSHD published a report ti
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An emerging literature has demonstrated that proportionately more dissatisfied employees intend to leave their employing organization while proportionately more satisfied employees intend to remain. The purpose of the present study was to apply criteria for aggregation of individual-level data to the grouplevel using a measure of job satisfaction i
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Truck weight data are required for pavement and bridge design, truck size and weight enforcement, and the development of administrative policy and legislation. The efficient collection and analysis of these data require that truck weighing-in-motion (WIM) equipment be used. Lower cost WIM systems are necessary for use in meeting the needs of nation
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Nondestructive deflection testing (NOT) has become an integral part of the structural evaluation of pavements. Interpretation of the measured deflection data is extremely complex, and the analyzed pavement is often modelled as a multilayered elastic system. In this model the subgrade is usually defined as uniformly stiff and infinitely thick, or a
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United States. Department of Transportation. Federal Aviation Administration
1991-10-01
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The purpose of this advisory circular (AC) is to provide guidance to assist airport owners/operators in the development of an acceptable airport snow and ice control program and to provide guidance on appropriate field condition reporting procedures.
This report provides the instructions for a new design procedure for the flexible pavements in Texas. The Texas Flexible Pavement System (TFPS) is developed for the Texas State Department of Highways and Public Transportation (SDHPT) under Study 2-6- 86-455. TFPS is a "user-friendly menu driven" computerized design system and represents the latest
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This Instruction establishes the Coast Guard's policy on merit promotion and its intended for use when constructing merit promotion plans (MPPs) anywhere in the Coast Guard.
In 1988, the Oregon State Highway Division adopted the 1986 AASHTO guide for pavement thickness design. Currently the OSHD uses a layer coefficient of .22 to .24 for cement treated base (CTB), and .32 for plant mix bituminous base (PMBB). Recycled asphalt pavement grindings (RAP) have been given the same layer coefficient as that used for aggregate
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The resilient characteristics of cold in-place recycled asphalt concrete with and without lime were examined. Six core samples were obtained from a site two months after construction; six months later, six additional core samples were obtained from the site. The samples were tested in the laboratory for resilient modulus. Conclusions of this study
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This report includes an analysis of traffic accident data in Kentucky for the years of 1986-1990. A primary objectve of this study was to determine average statistics for kentucky highways. Average and critical number and rates of accidents were calculated for various types of highways in rural and urban areas. These data can be used in Kentucky's
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This report presents the results of a research conducted in a hydraulic flume todetermine the stability of rock riprap protecting abutments located on floodplains. The observed vulnerable zone for rock riprap failure is presented fortwo abutment types: vertical wall and spill-through (H:V = 2:1).Equations and velocity multipliers to assist an engin
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This guide is intended to serve highway engineers as an introduction to the usage of BREXS, a knowledge-based expert system for bridge rail selection. Both new construction and retrofit cases of rail selection and installation are treated. Following instructions for installation of the software and required microcomputer hardware, the user is instr
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This document provides the Texas Department of Transportation the initial step in developing a methodology for conducting intercity route studies. It is intended to assist the analyst in identifying the key factors that should be addressed in intercity route studies and to provide guidance in selecting the appropriate procedure(s) for evaluating th
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While many organizations invest substantial resources in their information systems, few organizations realize the maximum value from this investment because the objectives guiding the implementation and maintenance of the information systems are n0t consistent with the objectives of the business. The purpose of the information systems planning is t
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This report provides information on recent federal and state legislation and policies relating to transit systems in Texas. Information is presented on: 1) the 1990 Americans with Disabilities Act; 2) the 1990 Clean Air Act Amendments; 3) the EPA Storm Water Discharge Permitting Process; 4) the Urban Mass Transportation Administration Uniform Syste
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Presented here are the results of a research and compliance testing program to develop a low-cost, high-performance terminal for portable concrete barriers (PCBs) and permanent concrete median (CMB) and roadside barriers. The result is the Advanced Dynamic Impact Extension Module (ADIEM). The energy absorption elements of this terminal are lightly
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United States. Department of Transportation. National Highway Traffic Safety Administration
1991-08-05
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The National Highway Traffic Safety Administration (NHTSA) announced New Mexico as the first state to qualify for a special anti-drunk driving grant, which could bring $627,621 to the state annually for three years.
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