This research explored lessons that have been learned involving human factors in the design and operation of control centers that were similar to a generic, intelligent vehicle highway system (IVHS) class traffic management center (TMC). During an initial phase, brief visits were made at 10 existing operation control centers. Three of these were se
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John A. Volpe National Transportation Systems Center (U.S.)
1995-08-01
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The appropriate level of spatial and temporal data aggregation for highway vehicle emissions analyses is one of several important analytical questions that has received considerable interest following passage of the Clean Air Act Amendments (CAAA) of 1990. The primary purpose of this report is to examine the effects on vehicular emissions that resu
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The Federal Highway Administration (FHWA) recognizes that many metropolitan areas are struggling with how to respond adequately to the 1990 Clean Air Act Amendments (CAAA) and the 1991 Intermodal Surface Transportation Efficiency Act (ISTEA), particularly the process for establishing the conformity of the transportation improvement programs (TIPs)
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The course material presented was developed under FHWA Contract No. DTFH61-92-C-00052, "Work Zone Safety Inspection Training Course." Information and visual aids were gathered through a review of literature and video tapes and telephone conversations with Federal Highway Administration and state transportation agency personnel and equipment manufac
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This report concerns in-car systems that may be used to present navigation, hazard warning, vehicle monitoring, traffic, and other information to drivers in cars of the future. It describes in detail measurements researchers have made to determine if those systems are safe and easy to use. Measures that appear most promising for safety and usabilit
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This final report documents the findings of a research program designed to collect and critically assess information on issues impacting bridge painting. Life-cycle costs and performance were used to assess the economics of maintenance painting. These assessments are made difficult (uncertain) because performance data and hidden application costs a
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The third in a series of experiments exploring human factors issues related to the Automated Highway System (AHS) investigated the transfer of control from the driver of a vehicle entering an automated lane to the AHS. Twenty-four drivers aged between 25 and 34 years drove in the Iowa Driving Simulator--a moving base hexapod platform containing a m
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United States. Department of Transportation. Federal Highway Administration
1995-08-01
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This summary report briefly reports the results of a two phase laboratory investigation that studied the design of symbol signs to aid older drivers. Phase I results found that (1) older drivers' comprehension of symbol signs was poorer than both younger and middle-aged drivers, and (2) older drivers' legibility distances were shorter. These findin
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Four on-road experiments investigated whether the assumed values for driver perception-reaction time (PRT) used in AASHTO design equations adequately represent the range of actual PRT for older drivers. The Case III (stop controlled) intersection sight distance (ISD) experiment found that older driven did not have longer PRT than younger drivers; 8
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A simulation model for predicting driver behavior and system performance when the automobile driver performs concurrent steering and auxiliary in-vehicle tasks is described. This model is an integration of two previously existing computerized models referred to as the "procedural model" and the driver/vehicle model". The procedural component deals
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The first two experiments in a series exploring human factors issues related to the Automated Highway System (AHS) used a generic AHS configuration--the left lane reserved for automated vehicles, the center and right lanes containing unautomated vehicles, no transition lane, and no barriers between the automated and unautomated lanes--that was simu
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The SaFIRES operational test was chosen by the FHWA to be the subject of a case study. Several case studies were performed under the Intelligent Transportation Systems ITS Institutional and Legal Issues Program, which was developed in response to the Intermodal Surface Transportation Act of 1991. The objective of each case study was to determine (1
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INTELLIGENT VEHICLE INITIATIVE OR IVIABSTRACTTHE GOAL OF THE TRAVTEK CAMERA CAR STUDY WAS TO FURNISH A DETAILED EVALUATION OF DRIVING AND NAVIGATION PERFORMANCE, SYSTEM USABILITY, AND SAFETY FOR THE TRAVTEK SYSTEM. TO ACHIEVE THIS GOAL, AN INSTRUMENTED " CAMERA CAR" WAS DEVELOPED TO PROVIDE COMPREHENSIVE DRIVING PERFORMANCE AND BEHAVIOR MEASUREMENT
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This test report contains the test results from a series of four crash tests conducted at the Federal Outdoor Impact Laboratory (FOIL) located at the Turner-Fairbank Highway Research Center (TFHRC) in McLean, Virginia. The tests were frontal crash tests involving 1981 through 1983 Honda Civic two-door sedans. Three Honda Civics impacted the FOIL's
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A finite element simulation of a small automobile impacting a rigid instrumented pole using the nonlinear finite element code DYNA3D is presented in this report. The vehicle model was based on a 1989 Ford Festiva, a member of the 820C class of vehicles defined in NCHRP Report 350. The Ford Festiva is a good representative of the 820C class based on
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This study was performed to investigate the effect of combining a freeze cycle, an ultraviolet/condensation cycle (QUV), and a salt-fog plus pollutant/dry cycle (Prohesion) in an accelerated laboratory weathering test on the performance of coating systems for steel bridges. The test results were compared with those obtained from the salt-fog test,
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Recent regulations concerning volatile organic compounds (VOCs) and certain hazardous heavy metals have had an impact on the construction and maintenance practices of transportation authorities. Powder coatings are a 100 percent solids material that are heat cured, thus they have near-zero VOC emissions during application. This report presents the
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The purpose of this manual is to provide guidance in preventing erosion and controlling sediment on highway construction projects. It addresses the selection of erosion and sediment control measures and the develop of erosion control plans. Construction and inspection of the measures are presented for each practice.
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