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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.

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Showing 33901 - 33920 of 35412 results
  • Concrete finishes for highway structures
    Concrete finishes for highway structures.
    Brown, H. E
    1975-01-01 | PDF
    The site conditions just about always dictate the basic layout of a structure. The choices of materials and appearance are usually made by the engineer. The materials going into the structure get a great deal of attention, but unfortunately the appearance too frequently does not. It is not unusual then to find a very few structures with deficiencie ...
  • Further studies of a trussedweb girder composed of reinforced plastics
    Further studies of a trussed-web girder composed of reinforced plastics.
    McCormick, Fred C ;
    Alper, Husamettin
    1975-01-01 | PDF
    Three single section and one trisection girder, s eight feet long were fabricated and load tested to determine the deflection, strain, and creep characteristics of the members. One specimen fabricated with stranded elements composed of Kevlar 49 instead of glass exhibited improved stiffness properties. The maximum load applied to a specimen was 600 ...
  • Users manual for the Noise 1 area computer program for transportation noise prediction report under project entitled area computer model for transportation noise prediction phase 1 adaptation of MICNOISE
    User's manual for the Noise 1 area computer program for transportation noise prediction : report under project entitled "area computer model for transportation noise prediction : phase 1 : adaptation of MICNOISE".
    Sullivan, Dan ;
    Haviland, J. K
    1975-01-01 | PDF
    It was found that the coordinates of the highways required for Noise 1 could be supplied on punched cards by the Photogrammetry Section of the Department. In preparing data for contour plotting, it was found advisable to divide the area into sectors, with each sector being surrounded by the edges of roads or by internal boundaries. In this manner, ...
  • A benchscale evaluation of the reuse of water at highway rest areas
    A bench-scale evaluation of the reuse of water at highway rest areas.
    Heitman, Robert H ;
    Kitchen, James D
    1975-01-01 | PDF
    A pilot laboratory treatment system was successfully employed to investigate the reuse of wastewater for flushing toilets at highway rest areas. This extended aeration unit used a synthetic waste to determine if the biological system could operate efficiently at high dissolved solids concentrations produced by effluent recycle rates of up to 95 per ...
  • The design of temporary sediment controls for soil losses from highway cut slopes
    The design of temporary sediment controls for soil losses from highway cut slopes.
    Poche´, David J
    1975-01-01 | PDF
    No Description
  • An ecological assessment of a bridge demolition
    An ecological assessment of a bridge demolition.
    Poche´, David J ;
    Hensley, Barbara
    1975-01-01 | PDF
    Bridge demolition has long been known to mobilize large amounts of stream sediment in the immediate area of the structure. An ecological assessment in terms of stream macroinvertebrate samples and suspended solids measurements was made shortly before, shortly after and eight months after a demolition of a bridge deck. No environmental damage was in ...
  • An analysis of pricesubsidy issues in public transportation and some suggestions of practical importance
    An analysis of price-subsidy issues in public transportation and some suggestions of practical importance.
    Allen, Gary R
    1975-01-01 | PDF
    This report is directed to highway and transportation officials and other state and local government officials faced with questions of public transit subsidies. The questions are very real ones and, in this one's opinion, require well founded answers.* By means of this exposition, the author provides the above audience with several conclusions, rec ...
  • Area computer model for transportation noise prediction phase IIimproved noise prediction methods
    Area computer model for transportation noise prediction : phase II--improved noise prediction methods.
    Haviland, J. K ;
    Sullivan, Dan
    1975-01-01 | PDF
    This report recommended that NOISE 3 initially use the same basic logic as the MICNOISE program for highway noise prediction except that additional options be made available, such as flexibility in specifying vehicle noise sources. A choice of six noise ratings was recommended, including Ldn, the day-night level then being proposed by the EPA for g ...
  • An investigation of the load distribution on a timber decksteel girder bridge
    An investigation of the load distribution on a timber deck-steel girder bridge.
    Hilton, Marvin H ;
    Ichter, Larry L
    1975-01-01 | PDF
    The load distribution on a 48.5-ft. span timber deck-steel girder bridge built to the Virginia Department of Highways and Transportation standard SS-4 requirements was investigated under two conditions. The first condition was concerned with the load distribution when the timber deck fasteners were tight and the second condition involved investigat ...
  • Latex modified Portland cement overlays an analysis of samples removed from a bridge deck
    Latex modified Portland cement overlays : an analysis of samples removed from a bridge deck.
    Hilton, Marvin H ;
    Walker, Hollis N
    1975-01-01 | PDF
    This report describes an evaluation of the latex modified mortar overlay the Route 85 (NBL) bridge over the Roanoke River. While the performance of the overlay has been generally satisfactory, corings and chloride analyses indicate the possibility of future distress beyond the cracking that has been noted to date The problems associated with the ov ...
  • Blended aggregate bituminous mixes
    Blended aggregate bituminous mixes.
    Hughes, Charles S ;
    Mahone, David C
    1975-01-01 | PDF
    Virginia has provided skid resistant pavements in the limestone area of the state by placing thin overlays of sand mixes incorporating local materials, by sprinkling highly skid resistant aggregates on limestone bituminous mixes prior to rolling, and by blending polish resistant aggregate with limestone. All of these methods have met with success, ...
  • Effect of pavement texture on tireroad noise
    Effect of pavement texture on tire-road noise.
    Noble, David F
    1975-01-01 | PDF
    Because of the potentially conflicting considerations for cost, durability, environment and safety the design engineer must have information on each such subject on which to base his decisions. The great variety of pavement textures for affecting the noise levels generated by traffic on the highway, made the need for information on the effect of pa ...
  • Field evaluations of waterproof membrane systems for bridge decks 19721974
    Field evaluations of waterproof membrane systems for bridge decks, 1972-1974.
    McKeel, Wallace T
    1975-01-01 | PDF
    Waterproof membrane systems are being studied by many agencies from the standpoint of their effectiveness in protecting the reinforcing steel in concrete bridge decks against corrosion. Trial applications and evaluations of six such systems, including both preformed sheet and liquid membranes, were made in Virginia during the period from 1972 throu ...
  • Evaluation of bridge decks on Route I64 at Hampton Virginia
    Evaluation of bridge decks on Route I-64 at Hampton, Virginia.
    McKeel, Wallace T
    1975-01-01 | PDF
    The testing of 15 bridges on Route I-64 just west of the Hampton Roads Bridge Tunnel marked the first major use of electrical potential readings and chloride analyses in evaluating the condition of bridge decks in Virginia. Two of the decks were also sounded with a chain drag to disclose any areas of delaminated concrete. In general, the electrical ...
  • Virginia highway taxes compared with those of bordering states
    Virginia highway taxes compared with those of bordering states.
    Daniel, Thomas C
    1975-01-01 | PDF
    This report is an update of a similar publication prepared in 1965 by John Thompson It presents a summary comparison between the highway revenues of Virginia and those of Maryland, West Virginia, Kentucky, Tennessee, and North Carolina. It details the types of taxes levied in each state viz., motor fuel taxes, motor vehicle registration taxes and f ...
  • The effects of stream channelization on bottom dwelling organisms phase 1 report 1974 construction season
    The effects of stream channelization on bottom dwelling organisms : phase 1 report : 1974 construction season.
    Wyant, David C
    1975-01-01 | PDF
    Two streams being channelized under Department contracts have been monitored since June 1974. Suspended solids, flow, rainfall and benthic population measurements have been obtained at various times for each stream. At present, all but the benthic population data have been processed. Research will continue on the two streams monitored in 1974. In a ...
  • Diagnosis referral and rehabilitation within the Fairfax Alcohol Safety Action Project 1974
    Diagnosis, referral, and rehabilitation within the Fairfax Alcohol Safety Action Project, 1974.
    Lynn, Cheryl
    1975-01-01 | PDF
    This report is a combination of Analytic Study #5 (Diagnosis and Referral) and Analytic Study #6 (Rehabilitation). Data concerning these countermeasures are presented together because of their very close relationship within the Fairfax ASAP. Both the diagnosis and referral, and the rehabilitation systems are described and statistics concerning thei ...
  • Evaluation of several types of curing and protective materials for concrete part IV final report on performance
    Evaluation of several types of curing and protective materials for concrete : part IV : final report on performance.
    Newlon, Howard
    1975-01-01 | PDF
    Various curing and/or protective coatings were evaluated under three conditions: (1) accelerated laboratory freezing and thawing of specimens in 2 percent sodium chloride solution, (2) exposure in an outdoor area of slabs subjected to controlled application of deicers, and (3) exposure of some of the materials on three bridges. The performance of t ...
  • Literature review simple test method for possible use in predicting the fatigue of asphaltic concrete
    Literature review : simple test method for possible use in predicting the fatigue of asphaltic concrete.
    Freeman, J. R ;
    Maupin, G. W
    1975-01-01 | PDF
    It has been recognized for many years that fatigue is one of many mechanisms by which asphaltic concrete pavements fail. Experience and empirical design procedures such as those developed by Marshall and Hveem have enabled engineers to design-mixtures against most common premature failure mechanisms such as rutting and bleeding, but due to the comp ...
  • Feasibility of reducing fines in S5 mixes
    Feasibility of reducing fines in S-5 mixes.
    Johnson, H. W
    1975-01-01 | PDF
    The study investigated the feasibility of eliminating aggregate particulates passing the #200 and #100 sieves from a surface mix (S-5) gradation. Feasibility was to be determined on the basis of test mixtures, with particulates deleted, meeting Virginia's specifications. Two aggregates, greenstone and granite, were used to prepare Marshall specimen ...
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