Statistical sampling plans were developed for obtaining samples of reclaimed asphalt concrete from the roadway prior to recycling, from trucks transporting processed reclaimed asphalt concrete, and from stockpiles of materials to be used for hot-mix recycling. The plans were tested on five recycling projects. Physical and chemical tests were run on
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This study reports on the experience of more than 30 political jurisdictions throughout the United States which have converted multiway, stop sign-controlled intersections to lesser forms of controls. In all instances, those officials interviewed during field visits reported converting 4-way or 3-way stop intersections to 2-way or 1-way stop inters
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The Surface Transportation Assistance Act mandates greater uniformity in truck size and weight, requiring some States to raise their limits, at least for trucks traveling on the National Network of Highways, comprised of the Interstate System and portions of the Federal-Aid Primary System. Part of the law allows the States to mark these routes with
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United States. Federal Highway Administration. Office of Highway Safety
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1984-12-01
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PDF
The report contains an extension of a series of statistical data published annually since 1967 by the Federal Highway Administration (FHWA) as Fatal and Injury Accident Rates on Federal-Aid and Other Highway Systems. The series has been a cooperative effort of the FHWA's Offices of Traffic Operations, Highway Safety, and Highway Planning, The State
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Soil Reinforcement for Stabilization of Earth Slopes and Embankments; Steel Corrosion in Concrete: pH at Corrosion Sites; Safety Impacts of RRR Projects
This is a summary of the procedures and findings of a study of highway signs to warn of restricted sight distance due to crest vertical curves. Driver awareness, understanding, and response to the existing LIMITED SIGHT DISTANCE (LSD) sign and several alternative signs were measured. Following a study of performance requirements, a large number of
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This study examined the feasibility of adhesive bonding and bolting tensile splices, beam flange splices and cover plates with ends bolted. The specimens were subjected to fatigue and static loading. The results showed that bonding the contact surfaces significantly increased the fatigue life of high-strength bolted splices. Bonding cover plates in
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This volume is a detailed report of a research program conducted to evaluate the feasibility of centrifuge tests on model piles and pile groups in clay using the geotechnical centrifuge. The report describes the preparation of the clay samples, details of the model piles, methods of pile placement, centrifuge details and operation, and test procedu
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This volume is a detailed report of a research program conducted to evaluate the feasibility of centrifuge tests on model piles and pile groups in clay using the geotechnical centrifuge. The report describes the preparation of the clay samples, details of the model piles, methods of pile placement, centrifuge details and operation, and test procedu
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This volume is a detailed report of a research program conducted to evaluate the feasibility of conducting tests on model piles and pile groups in sand using the geotechnical centrifuge. The report describes the preparation of the sand samples, details of the model piles, method of pile placement, description of the centrifuge and its operation and
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This volume describes in summary form the research program conducted to evaluate the feasibility of conducting tests of model piles and pile ·groups using the geotechnical centrifuge. The goals of the program are described, the testing programs in both sand and clay are briefly discussed, important results are presented and conclusions and recommen
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This manual provides a synthesis of practical hydrologic methods and techniques to assist the highway engineer in the analysis and design of highway drainage structures. The manual begins with a discussion of descriptive hydrology, the surface runoff process and hydrologic data with emphasis given to the highway stream-crossing problem. The commonl
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The material in this Volume expands on selected topics discussed in Volume I. It is intended to provide greater depth on the more imoportant issues covered in Volume I and to introduce related topics considered to be of secondary interest in the main Volume. Four appendices are contained in this Volume and correspond in sequence to Chapters II thro
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Bridge Safety; Two-Lane Rural Highway Safety; Implications of Small Passenger Cars on Roadside Safety; Railroad-Highway Crossings and Route Selection for Transporting Hazardous Materials; The Application of Pedestrian Signal at Traffic-Signalize Intersections
Available accident files are used to generate a 4l2-accident data base of guardrail impacts. This base is analyzed to develop a statistical model for predicting accident severity index (ASI) as a function of vehicle type or weight, impact speed, and impact angle. Reported full-scale test results are used to generate a 9l-test data base of guardrail
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Long-term monitoring efforts have been carried on for a number of years at state and national level and have been generally accepted. However, the shape that it takes in the future will depend very largely upon the decisions that are made in this Workshop concerning the following very basic issues: (1) What questions related to the financing manage
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