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.
The objective of this report is to provide a benchmark for elevator managers in assessing performance, and supply a source for recognizing trends in the characteristics of North Dakota elevators.
This report provides the bicycle and pedestrian component of Direction 2020,the DVRPC's long range transportation and land use plan for the Delaware Valley.The Bicycle and Pedestrian Mobility Plan covers five counties located insoutheastern Pennsylvania. The plan contains information about prevailingpolicies towards bicycles. It also provides infor
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One final overall observation from the workshop was that FHWA should consider case studies o findustry practices. This approach differs from TS&W modeling, but could be used to build a microapproach for national TS&W analysis. For example, different specialized models or case studies representing individual commodities, geographic regions or corrid
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This research report represents the seventh year of a ten-year research effort focused on quantifying urban mobility. This study contains the facility information for 50 urban areas throughout the country. The database used for this research contains information on vehicle travel, system length, and urban area characteristics from 1982 to 1992. Var
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This report documents the methodology used to develop the Houston-Galveston Nonattainment Counties gridded mobile source emissions inventories. Included in the report are an overview of the emission estimation methodology and the 24-hour traffic assignments used in the analyses; the methods used to estimate the seasonally adjusted time-of-day vehic
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The mandates of the Clean Air Act Amendments (CAAAs) and Intermodal Surface Transportation Efficiency Act (ISTEA) Congestion Mitigation and Air Quality (CMAQ) Improvement Program require the evaluation and monitoring of transportation control measure (TCM) emission impacts. The objective of the research documented herein was to investigate issues r
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Studies have shown that motor vehicle noise is a significant national problem in many communities. Construction of traffic noise barriers (sound walls) has been the most often used mechanism to mitigate vehicle noise for residents living next to high density roadways or proposed high density roadways. The purpose of this three-phase research projec
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This manual was developed as part of a project funded by the Texas Department of Transportation (Tx.DOT) to implement methods of improving transportation planning techniques and is based on research conducted in a previous project to examine methods of improving transportation planning techniques. Within these research projects, the need to develop
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This report presents the findings of an evaluation of the Department's need for a mode share estimating capability. The report documents the process to develop a standard/basic mathematical model for estimating transit riders in an urban area. The model was developed using data from San Antonio, Texas, and is operational using standard TRANPLAN pro
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The bonded concrete overlay (BCO) is emerging as a method of pavement repair which minimizes costs and traffic disruption. When existing methods of expedited paving are combined with rapid strength gain concrete, the potential exists to return traffic on to a pavement within twenty-four hours of closure. In order to determine the long-term effects
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This report documents the results of the October 1994 and May 1995 traffic data collection and automobile user panel survey efforts during the fifth year of the US-7 5 North Central Expressway reconstruction project south of the I-635 LBJ Freeway in Dallas, Texas. Traffic conditions and patterns have been monitored each October and May since 1990.
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The first objective of this study was to evaluate the relative rutting characteristics of overlaid pavements, where the overlaid section (i.e., new "base") had previously exhibited rutting. A second study objective was to develop criteria for the design of overlays for unstable "bases". The mixtures were evaluated in an LCPC Wheel Tracker. Slabs of
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In 1991, two Durafiber polypropylene fiber reinforced concrete lined detention ponds were constructed. The detention ponds are located on the north side of the 181st Avenue Interchange, on the Columbia River Highway (I-84), approximately ten miles east of Portland, Oregon.The original design called for the detention ponds to be constructed with six
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This report covers the construction in 1992 of test sections on two projects using asphalt concrete modified with tire rubber. One project's test sections are part of a single lift overlay on a lightly traveled two-lane road south of Klamath Falls, Oregon. The other project's test sections are part of the base course of a three-lift overlay on a he
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United States. Department of Transportation. Federal Aviation Administration
1995-09-01
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DOC
The Federal Aviation Administration's (FAA's) Aging Aircraft NDI Validation Center (AANC) at Sandia National Laboratories applied two nondestructive inspection (NDI) techniques for the inspection of a Piper PA-25 forward spar fuselage attachment fitting. A review of two PA-25 accidents revealed the susceptibility of these fittings to corrosion and
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The objective of the study (Phase II) was to evaluate the economical usage of flyash as a backfill material in the vertical moisture barrier. Mainly flyash was evaluated in terms of its strength, permeability, shrinkage potential, and mobility of heavy metals present in the flyash.
Snow is a crucial factor affecting the U.S. Army's operations in cold regions. Values for snow depth and snow density are needed for vehicle mobility studies, but unfortunately the available historical records of these parameters tend to be relatively sparse. This report deals with the estimation of snow density and snow depth from readily availabl
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This report describes the general physical and operational characteristics and bottlenecks to the efficient operation of intermodal terminals and systems in the New York metropolitan area and its vicinity.
Biofiltration is the process of filtering polluted water through vegetation to remove pollutants. Pollutants may be removed through settling, infiltration, and adsorption to sediment and vegetation. This report summarizes the findings of three parallel studies into the use of biofiltration to remove pollutants from highway runoff. A grassed swale a
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