Through truss structures are unique in that the superstructure of the bridge is exposed to impacts from errant vehicles. Effective bridge railings must not only exclude these vehicles from contacting the critical truss members by limiting system deflection, but must also prevent heavy vehicles from rolling over the barrier and contacting a truss me
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This report presents an estimate of existing (1984) and future (2005) levels of congestion on the Nation's urban freeways based on data contained in FHWA's Highway Performance Monitoring System (HPMS) database. Estimates of congested travel, delay due to recurring congestion, delay due to non-recurring (incident) congestion, and wasted fuel are mad
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This volume presents a summary of relevant information available on geocomposite drain products, current research in testing of their critical properties, and design considerations including specifications. This volume is intended to provide the engineer with a summary of currently available technical information and comments on the design and use
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United States. Department of Transportation. Federal Highway Administration
1986-09-01
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PDF
This material has been compiled to serve as a background of reconstruction experiences. Included are case studies which document the varied projects and give specific ideas for the management of major highway reconstruction. Also provided in this report are sections on the use of incentive/disincentive provisions for early contract completion; a su
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The full-text of this handbook is available online in PDF format, with a link from the Federal Railroad Administration home page. Rail-highway grade crossing safety and operational problems involve two components-the highway and the railroad. The highway component involves drivers, pedestrians, vehicles and roadway segments in the vicinity of the c
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The best method for qualifying high performance coatings incorporates field testing and laboratory testing to determine performance characteristics. Recommended practices for cleaning structural steel and applying paints apply to high performance coatings. However, inspection is critical, as both surface cleanliness and film thickness are the exact
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Procedures for evaluating the moisture susceptibility of asphalt mixtures were compared by performing them on mixtures having a known history of susceptibility. Data included the retained ratios, visual stripping, mechanical values (tensile strength, stability, etc.), saturation, and swell. The most promising procedures appeared to be the NCHRP 246
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This manual describes countermeasures for reducing highway sign vandalism and the costs associated with the repair and replacement of vandalized signs. Guidelines are also presented for planning, implementing, and evaluating antivandalism programs. The manual is intended for use by State and local personnel involved in sign system maintenance and o
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1986-09-01
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Nationwide Personal Transportation Survey (NPTS)
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PDF
Volume II of the two-part report presents supplemental tables relating to data on drivers, vehicle and person trips and travel, workers and their home-to-work journey, vehicle occupancy, characteristics of travel period trips and travel, and the use of vehicle safety devices published in Volume I. In addition, weighting procedures and estimates of
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This manual provides guidelines for the identification, inspection, and evaluation of fracture critical bridge members. It is a sand alone supplement to the Bridge Inspector's Training Manual 70. The text provides information on planning, inspecting, and documenting the inspection of fracture critical bridge members (FCMs) as well as explanations r
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The Potential for Reduced Lighting on Roadways; Corrosion in Reinforced Soil Structures; Toward Improved Highway Safety Analysis; Analytical Procedures for Estimating Freeway Traffic Congestion
This volume presents procedures and guidelines applicable to the design and instaltion of prefabricated vertical drains to accelerate consolidation of soils. Thecontents represent the Consultant's interpretation of the state-of-the-art as ofAugust 1986. The volume is intended to provide assistance to engineers in determiningthe applicability of PV
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This is the second of a three volume report prepared to provide highway engineers a ready reference on overlay design procedures. It contains the results of a questionnaire concerning use of overlay design procedures by state agencies and appendices for the first volume including the figures for the sensitivity analysis. The first volume (FHWA/RD-8
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This report covers an assessment of ground-probing radar technology as a rapid, nondestructive technique for the evaluation of the structural integrity of portland cement concrete bridge decks. Delaminations normally occur at the plane of the top mat of reinforcing steel within reinforced decks. This delamination is not evidenced by surface manifes
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1986-08-01
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Nationwide Personal Transportation Survey (NPTS)
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PDF
Volume I of a 2-part report which presents findings from the 1983-1984 Nationwide Personal Transportation Study (NPTS). This report examines drivers and their travel, vehicle trips and travel, person trips and travel, workers and their journey-to-work, vehicle occupancy, characteristics of travel period trips and travel and the use of vehicle safet
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1986-08-01
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Nationwide Personal Transportation Survey (NPTS)
|
PDF
Volume I of a 2-part report which presents findings from the 1983-1984 Nationwide Personal Transportation Study (NPTS). This report examines drivers and their travel, vehicle trips and travel, person trips and travel, workers and their journey-to-work, vehicle occupancy, characteristics of travel period trips and travel and the use of vehicle safet
...
1986-08-01
|
Nationwide Personal Transportation Survey (NPTS)
|
PDF
Volume I of a 2-part report which presents findings from the 1983-1984 Nationwide Personal Transportation Study (NPTS). This report examines drivers and their travel, vehicle trips and travel, person trips and travel, workers and their journey-to-work, vehicle occupancy, characteristics of travel period trips and travel and the use of vehicle safet
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