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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 31061 - 31080 of 35440 results
  • US 75 North Central Expressway Reconstruction Northwest Highway Screen Line Automobile and Transit User Panels Initial Survey Results
    U.S. 75 North Central Expressway Reconstruction: Northwest Highway Screen Line Automobile and Transit User Panels, Initial Survey Results
    Ullman, Gerald L. ;
    Krammes, R. A.
    1990-09-01 | PDF
    This report documents the creation of separate automobile and transit user panels for monitoring the effect of North Central Expressway construction upon travel behavior In the corridor. The report also summarizes the results of the initial pre-construction survey of these panel members against which future surveys will be compared. The typical aut ...
  • The Ninth National Conference on Rural Public Transportation Final Report
    The Ninth National Conference on Rural Public Transportation - Final Report
    Texas. Division of Transportation Planning
    1990-09-01 | PDF
    This report consists of transcriptions from the sessions of the subject conference, held in October 1989 in San Antonio, Texas. This biennial conference is one of the premier technical sessions held on the topic, and covered the full range of topics associated with rural transportation. Session included material on marketing, coordination, private ...
  • The Use of Contact Lenses in the Civil Airman Population
    The Use of Contact Lenses in the Civil Airman Population
    Nakagawara, Van B.
    1990-09-01 | PDF
    Federal Aviation Regulations permit the routine use of contact lenses by civilian pilots to satisfy the distant visual acuity requirements for obtaining medical certificates. Specific information identifying the prevalence of both defective distant vision and contact lenses in the civil airman population is required to guide future medical certific ...
  • Development of a Crashworthy Seat for Commuter Aircraft
    Development of a Crashworthy Seat for Commuter Aircraft
    Gowdy, Van
    1990-09-01 | PDF
    A series of dynamic impact tests were conducted using a prototype seat with an energy absorbing mechanism as part of the seat pan. The seat frame was designed to represent a typical commuter aircraft passenger seat. Tests were conducted in an orientation simulating a vertical impact with a 30-degree nose-down aircraft attitude. The impact severity ...
  • The FAA Altitude Chamber Training Flight Profile A Survey of Altitude Reactions 19651989
    The FAA Altitude Chamber Training Flight Profile: A Survey of Altitude Reactions, 1965–1989
    Valdez, Charles D.
    1990-09-01 | PDF
    Reactions from 1,161 trainees out of 12,759 trainees subjected to the FAA altitude chamber training flights from 1965-1989 are annotated in this survey. Although there were some mild and expected reactions, these training profiles appear to provide a safe learning environment without compromising the student's health and safety. Inside chamber inst ...
  • Achieving compatibility of State and Federal safety requirements
    Achieving compatibility of State and Federal safety requirements
    United States. Federal Highway Administration
    1990-08-01 | PDF
    The Commercial Motor Vehicle Safety Regulatory Review Panel (Safety Panel) has prepared this report in response to Sections 207, 208, and 209 of the Motor Carrier Safety Act of 1984 (Public Law 98-554). This report provides the Secretary of Transportation with the results of the Safety Panel's review of safety requirements affecting interstate moto ...
  • An Improved Traffic Assignment Process for ProjectLevel Analysis
    An Improved Traffic Assignment Process for Project-Level Analysis
    Chung, Chun Soo ;
    Stover, Vergil G.
    1990-08-01 | PDF
    This research investigated a restraint assignment procedure which would provide assignment results that are more directly applicable to project-level planning and design. This assignment process was expected to provide more equalized link volume/capacity ratios for the links on the competing roadways within a project area. A prototype assignment mo ...
  • A Comparison of Traffic Assignment Techniques
    A Comparison of Traffic Assignment Techniques
    Chang, Duk M ;
    Dresser, George B.
    1990-08-01 | PDF
    This report compares and evaluates the traffic assignment results from five assignment techniques: all-or-nothing, stochastic multipath, iterative, incremental, and equilibrium. The results of the assigned volumes from the five techniques are compared to ground counts. Various statistical measures are used to evaluate the results. Five different as ...
  • An Operational Evaluation of Truck Restrictions on SixLane Rural Interstates in Texas
    An Operational Evaluation of Truck Restrictions on Six-Lane Rural Interstates in Texas
    Zavoina, Michael C. ;
    Urbanik II, Thomas
    1990-08-01 | PDF
    With the increased expansion of rural Interstates to six lanes, questions have arisen as to the proper operational strategy of those facilities. One approach is to restrict trucks and other large vehicles from one or more of the lanes. The effects of such a restriction, however, have not been extensively studied. This study analyzes the operational ...
  • Comprehensive Evaluation of Five Sensors Used for Pavement Monitoring
    Comprehensive Evaluation of Five Sensors Used for Pavement Monitoring
    Tandon, Vivek ;
    Nazarian, Soheil
    1990-08-01 | PDF
    The Falling Weight Deflectometer (FWD) and Dynaflect devices are presently being used by highway agencies. The primary function of the FWD and Dynaflect devices is to measure a deflection basin due to a load imparted to the pavement. Deflection basins measured in the field are used in backcalculating modulus profiles of pavement sections. As such, ...
  • Users Manual to Computer Program CALIBRAT A Program for Calibration of Nondestructive Testing Devices
    User’s Manual to Computer Program CALIBRAT: A Program for Calibration of Nondestructive Testing Devices
    Tandon, Vivek ;
    Nazarian, Soheil
    1990-08-01 | PDF
    The Falling Weight Deflectometer (FWD) and Dynaflect devices are presently being used by highway agencies. The primary function of the FWD and Dynaflect devices is to measure a deflection basin due to a load imparted to the pavement. Deflection basins measured in the field are used in backcalculating modulus profiles of pavement sections. As such, ...
  • An Absolute Calibration System for Nondestructive Testing Devices
    An Absolute Calibration System for Nondestructive Testing Devices
    Tandon, Vivek ;
    Nazarian, Soheil
    1990-08-01 | PDF
    The Falling Weight Deflectometer (FWD) and Dynaflect devices are presently being used by highway agencies. The primary function of the FWD and Dynaflect devices is to measure a deflection basin due to a load imparted to the pavement. Deflection basins measured in the field are used in backcalculating modulus profiles of pavement sections. As such, ...
  • Evaluation of microsilica admixture for production of high strength concrete
    Evaluation of microsilica admixture for production of high strength concrete.
    Rasoulian, Masood
    1990-08-01 | PDF
    This study consisted of a laboratory evaluation of the effect of microsilica on the physical properties of both plastic and hardened portland cement concrete. Microsilica (silica fume) is a by-product of the industrial manufacture of ferro silicon and other metallic silicones in high-temperature electric arc furnaces. Microsilica is a very fine mat ...
  • Fly ash in concrete final report
    Fly ash in concrete : final report.
    Rasoulian, Masood
    1990-08-01 | PDF
    This study was initiated to develop information regarding the use of fly ash in portland cement concrete for state construction projects.Concrete mixes containing 10%, 20%, 30%, 40% and 60% fly ash were evaluated in the laboratory in combination with various cement contents. Type C fly ash was selected from three local sources which had been approv ...
  • Correlates of Two Experimental Tests with Performance in the FAA Academy Air Traffic Control Nonradar Screen Program
    Correlates of Two Experimental Tests with Performance in the FAA Academy Air Traffic Control Nonradar Screen Program
    Schroeder, David J. ;
    Dollar, Carolyn S.
    1990-08-01 | PDF
    This study was designed to determine the relationships among experimental tests, the tests currently used to select entrants into the FAA's Air Traffic Control Specialist (ATCS) Academy Nonradar Screening Program, and Academy success. A battery of paper-and-pencil tests, including the Directional Headings Test (DHT) which was developed at the Civil ...
  • Evaluation of Functional Color Vision Requirements and Current Color Vision Screening Tests for Air Traffic Control Specialists
    Evaluation of Functional Color Vision Requirements and Current Color Vision Screening Tests for Air Traffic Control Specialists
    Mertens, Henry W.
    1990-08-01 | PDF
    An experiment was conducted to evaluate the relation of type and degree of color vision deficiency and aeromedical color vision screening test scores to performance of color-dependent tasks of Air Traffic Control Specialists. The subjects included 37 normal trichromats of which 6 had mild color abnormalities. Those subjects with color vision defici ...
  • Right Bundle Branch Block as a Risk Factor for Subsequent Cardiac Events
    Right Bundle Branch Block as a Risk Factor for Subsequent Cardiac Events
    Hudson, Leslie S. ;
    Booze, Charles F.
    1990-08-01 | PDF
    The identification of risk factors for adverse cardiac events is valuable to the certification of airmen. This study examines the importance of right bundle branch block (RBBB) as a risk factor for myocardial infarction (MI), atherosclerotic heart disease (ASHD) and coronary heart disease (CHD). Using a non-concurrent prospective design, 433 Class ...
  • Pilot Views of Montgomery County Texas Automated FSS Services
    Pilot Views of Montgomery County, Texas Automated FSS Services
    Manning, Carol A. ;
    Schroeder, David J.
    1990-08-01 | PDF
    The Federal Aviation Administration has seldom assessed the satisfaction of pilot "customers," with the services provided by its air traffic facilities. Most available information about pilots' satisfaction with Air Traffic Control (ATC) services is anecdotal; thus, decisions affecting the users have been based on management's perceptions rather th ...
  • Traffic Detector Handbook Second Edition
    Traffic Detector Handbook. Second Edition
    Fullerton, Iris J ;
    Kell, James H
    1990-07-01 | PDF
    This handbook is a revised, updated version of the Federal Highway Administration's "Traffic Detector Handbook", originally published as Implementation Package FHWA-IP-85-1. This upgraded version of the Handbook supersedes and replaces the previous edition. It has been restructured, corrected, and revised to update discussions of concepts and equip ...
  • Results of SpecialUse Truck Data Collection Volume III Executive Summary
    Results of Special-Use Truck Data Collection [Volume III, Executive Summary]
    Middleton, Dan R.
    1990-07-01 | PDF
    The objective of this study was to collect site-specific information, specifically regarding traffic classification counts and vehicle weights, at or near special-use activity centers. Report 420-3F (1) contains the complete results of these field studies. Commodities examined in the traffic classification counts were: timber, produce, grain, beef ...
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