This publication contains data on fatal and injury accidents and fatally and nonfatally injured persons involved in motor vehicle traffic accidents for calendar year 1977.
Importance of Inspection-Movable bridges are built to the rigid specificationsof such groups as the American Association of State Highway andTransportation Officials (AASHTO), the American Road Builders Association(ARBA) and Underwriters Laboratories (UL). While movable bridges aredesigned to provide many years of reliable service, they operate in
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The Texas State Department of Highways and Public Transportation has·developed and implemented a "quick-load" method for load testingpiling and drilled shafts. Using this method a load test can becompleted in a relatively short time of one to two hours. On smallprojects where the time consuming AASHTO test cannot be economicallyjustified, use of th
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The need to improve the Nation's safety record has been a concern of the highway profession since the first organized plan to build roads started after World War I. Our success and failure to accomplish this goal is best illustrated by analyzing the Nation's fatal accident rate during the last 50 years. The accident rate for any given year has been
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Four essential aspects of the longitudinal control of vehicles in an automated, individual-vehicle system are considered here: a) Sector-level control; b) Communications between each controlled vehicle and the sector computer; c) The development of techniques for obtaining extremely accurate estimates of a vehicle's state; and d) The control of eac
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Highway Design for Motor Vehicles—A Historical Review Part 8: The Evolution of Highway Standards; 1976 Guatemala Earthquake Damage to Highways and Bridges; 1974 Brake Performance Levels for Trucks and Passenger Cars; The Development of Acceptance Test Criteria for Frangible Sign and Luminaire Supports; Cement Concrete Roads in Belgium
Study of quarry rocks, core, weathered rock, and road base aggregates from 12 sources in western Oregon reveals that degree and type of alteration and textural distribution of glass are the chief causes of degradation in basaltic aggregate used in road construction. Smectitic clays are the alteration products most responsible for breakdown. Samplin
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This manual provides hydraulic design methods for various types of flexible channel linings. The permanent linings include vegetation and dumped rock riprap. The temporary linings are fiber glass roving, jutemesh, excelsior mat, and erosionet. Properly designed flexible discussed in the manual. linings have a number of advantages which are also Des
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Eleven steels typically used in highway bridge construction were evaluated for stress corrosion resistance in various environments. The effects of welding and 5% cold work were also investigated. Laboratory tests were verified by exposure of specimens at selected locations inteh United States. Both ASTM A325 and ASTM A490 bolts were evaluated for s
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The results of the project to collect freeway traffic data for use in developing and verifying incident detection algorithms are presented in three volumes. This volume gives a description of the first 200 data sets collected from a 42-mile freeway loop that had magnetic detectors at approximately one-half mile intervals. Included are a description
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From bridge rail information of 51 State highway agencies and personal interviews with five selected highway agencies, current state-of-the-art of bridge railing safety performance was assessed. Based on the analysis of 14 specific railing designs, an estimated assessment of the performance of bridge rails on a national scale is presented. The data
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Instrumented Vehicle Research on Highway Information Systems; Designing an Instrumented Driver Response System; Benefit-Risk Analysis in the Design of Highway Stream Crossing; Analysis and Remedies of Freeway Traffic Disturbances; Highway Design for Motor Vehicles—A Historical Review Part 7: The Evolution of Highway Grade Design
United States. Department of Transportation. Federal Highway Administration. Highway Statistics Division
1976-09-01
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This guide describes procedures for reporting data related to roadway mileage, facilities, and characteristics. Detailed procedures provide for submittal of annual mileage data to the Highway Statistics Division for use in computing national statistics. These procedures are intended to provide a workable means for submittal of data in computer read
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