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.
This report inventoried the current costs and procedures of VDOT's Secondary Count Program, with special attention to costs and procedures for traffic counts on unpaved roads. A survey of VDOT's nine District Traffic Engineers on unpaved road counts, a field evaluation of the accuracy of road tubes on unpaved roads, results of a literature review o
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The Inter-modal Surface Transportation Efficiency Act of 1991 (ISTEA) required states andmetropolitan areas designated as transportation management areas develop congestionmanagement systems. The Birmingham Planning Area is designated as a non-attainment area,and has been allocated Congestion Mitigation and Air Quality (CMAQ) funding and otherfeder
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This report describes an evaluation of the effectivenss of synthetic voiceAutomatic Terminal Information Service (ATIS) messages in a simulatedenvironment. The evaluation was conducted by ARINC and CTA, Incorporated, forthe Federal Aviation Administration (FAA) Technical Center under contractDTFA03-94-Q-00022.The evaluation consisted of a flight de
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A two year study was conducted as a continuation project for the Florida Department of Transportation (FDOT) to evlauate Municipal Waste Combustor (MWC) ash, Waste Glass, and Waste Tires for use as general highway fill. Initial studies conducted at Florid;Color illustrations reproduced in black and white. See also Volume 2, PB98-144207 and Volume 3
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The Year 2015 Transportation Plan is an intermodal plan that considers all modes of the existing transportation system, identifies needs, provides policy direction and defines the goals for planning andproject development in the Huntsville urban area for the next 20-year period. The plan was developed under provisions of the Intermodal Surface Tran
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A large percentage of bridges in the state of Iowa are classified as structurally or fiinctionallydeficient. These bridges annually compete for a share of Iowa's limited transportation budget. Toavoid an increase in the number of deficient bridges, the state of Iowa decided to implement acomprehensive Bridge Management System (BMS) and selected the
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The use of grit-impregnated, epoxy coated prestressing strand is a relatively new design strategy being used for corrosion abatement on new concrete structures. This application was chosen for the South Slough (Charleston) structure because it subject to a corrosive environment created by the salt in the marine air. Findings from the evaluation of
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The Oregon Department of Transportation (ODOT) Materials Unit has historically used one temperature for the mixing and compacting of laboratory fabricated asphalt concrete specimens. Since switching to the performance based asphalt (PBA) specifications in 1991, the Bituminous Design Crew has continued to use the same specimen preparation technique.
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Improved navigational technology, such as microwave landing systems (MLS) or global positioning systems (GPS), installed in today's commercial aircraft enable the air traffic control (ATC) system to better utilize its airspace. This increased efficiency is essential if the ATC system is to meet its growing demand. Another approach to help increase
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This paper describes a process that is currently being applied to the development and assessment of an advanced air traffic control (ATC) system, the Center TRACON Automation System (CTAS). This process deviates from established practices of ATC system development: iterative field testing is conducted early in development rather than later during p
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United States. Department of Transportation. National Highway Traffic Safety Administration
1995-04-01
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As in our FY 1995 Performance Plan, the agency program output measures are presented within a performance-based structure. This structure cuts across NHTSA budget line items, however, references correlate this plan with the agency's budget. The program output measures in this plan are essentially the same as were presented in the FY 1995 plan and i
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Argonne National Laboratory has conducted a study to ascertain the relative importance of improved highway materials compared to vehicle energy consumption on U.S. energy consumption. Energy savings through an improved highway infrastructure can occur in at least three ways. First, replacing aged and failing materials with improved and advanced mat
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This study was part of a research program in shift work and fatigue in the Air Traffic Control (ATC) environment. The purpose of the study was to investigate three different shift schedules in use at ATC facilities with respect to potential disruption of the sleep/wake cycle. A straight day schedule of early morning shifts (i.e., beginning before 0
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Two practical color vision tests were developed and validated for use in screening Air Traffic Control specialist (ATCS) applicants for work at en route center or terminal facilities. The development of the tests involved careful reproduction/simulation of color-coded materials from the most demanding, safety critical color task performed in each t
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This report describes the aerodynamics model used in a simulation model of an advanced short takeoff and vertical landing lift-far fighter aircraft. The simulation model was developed for use in piloted evaluations of transition and hover flight regimes; so that only low speed (M~0.2) aerodynamics are included in the mathematical model. The aerodyn
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A two circle horizontal flightpath synthesis algorithm for Vertical/Short Takeoff and Landing (V/STOL) terminal area operations is presented. This algorithm provides a flight-path that is tangential to the aircraft's velocity vector at the instant of flightpath select and has continuous curvature. The algorithm corrects deficiencies noted in tests
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Pursuant to a congressional request, GAO reviewed the National Weather Service's (NWS) Automated Surface Observing System (ASOS), focusing on: (1) the extent to which NWS has addressed ASOS operational problems; (2) the costs of resolving these operational problems; and (3) whether NWS plans for enhancing ASOS are reasonable.
This paper describes a new geometric analysis procedure for wing sections. This procedure is based on the normal mode analysis for continuous functions. A set of special shape functions is introduced to represent the geometry of the wing section. The generators of the NACA 4-digit airfoils were included in this set of shape functions. It is found t
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Eastern Washington Intermodal Transportation Study
1995-04-01
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This study examined the importance of the U.S. 395 corridor area for local and regional commerce. The analysis focuses on the use and importance of the highway system for local and regional commerce. However, it is recognized that the highway system is only one component of an extensive intermodal network serving the area. In particular, regional c
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Oregon. Department of Transportation. Materials and Research Section
1995-04-01
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As many of you already know, our new Rockfall Hazard Rating System (RHRS) has gained wide national acceptance and international interest. Our most recent effort, a study of rockfall over 1/4H:1V presplit slopes, represents the first installment in the development of a new rock fallout area design standard.
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