Improved perception-reaction time information for intersection sight distance

Hostetter, Robert S.; McGee, H. W.; Crowley, K. W.; Seguin, E. L.; Dauber, G. W.; Institute for Research (State College, Pa.)

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Improved perception-reaction time information for intersection sight distance

2002-08-01
By Hostetter, Robert S. ; McGee, H. W. ; Crowley, K. W. ; ...

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Creators:

Hostetter, Robert S. ; McGee, H. W. ; Crowley, K. W. ; Seguin, E. L. ; Dauber, G. W.

Hostetter, Robert S. ; McGee, H. W. ; Crowley, K. W. ; Seguin, E. L. ; Dauber, G. W. Less -
Corporate Creators:

Institute for Research (State College, Pa.)
Corporate Contributors:

United States. Federal Highway Administration. Office of Safety and Traffic Operations Research and Development
Subject/TRT Terms:

[+]

Automobile Drivers Human Subject Testing Reaction Time Visibility Distance
Publication/ Report Number:

FHWA-RD-02-003
Resource Type:

Tech Report
Edition:

Final report
Contracting Officer:

Morales, J. M.
Corporate Publisher:

United States. Federal Highway Administration
Abstract:

Perception-reaction time (PRT) data were obtained in an operational setting to assess the adequacy of existing PRT specifications for intersection sight distance standards. A sample of 124 subjects traversed a 3-hour driving circuit in an instrumented vehicle. An analysis of the YIELD-controlled (Case II) reaction data showed that the first reaction occurred before stopping sight distance in over 90 percent of the trials. On the basis of this finding and the recent finding that the PRT associated with stopping sight distance was adequate, it was concluded that the current driver time-related specifications for Case II intersections are adequate. The PRT measured for STOP-controlled (Case III) intersections was the interval from the first head movement after a stop to the application of the accelerator to enter the intersection. The mean PRT was 1.82 seconds, with the 85th percentile value being approximately 2.7 seconds. An analysis showed that the through movements produced a value lower than the overall mean and the turning movements produced a higher value. This led to the recommendation that the current value of 2.0 seconds be maintained for Case IIIA, but that the PRT for Cases IIIB and C (turning movements) be increased to 2.5 seconds. The results showed that there were no significant age or sex differences for any of the PRT measures.
Format:

PDF
Funding:

DTFH61-84-C-00047
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha-512:7ef7d920ef317415ee63f706cba422f9c43659a54ccafb8bdf392e4be4ac8add2baede9de24bb89cd5c998cb4644385654cc48feea2a4b4b1062ea40fe41e017
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https://rosap.ntl.bts.gov/view/dot/803/dot_803_DS1.pdf
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Improved perception-reaction time information for intersection sight distance

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