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Title: EFFECTS OF HORIZONTAL CURVATURE ON DRIVER VISUAL DEMAND
Accession Number: 00804650
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: A consistent design allows drivers to perform safely the task of driving, allowing attention or capacity to be dedicated to obstacle avoidance and navigation. A measure of the consistency of a design is the amount of visual information needed by a driver to maintain an acceptable path on the roadway. Vision occlusion is a technique that measures driver visual demand on a roadway. It allows a more direct evaluation of the effects of various geometric elements on the driver. Studies of the effects of variations of curve radius, deflection angle, spacing, and sequences revealed several relationships between roadway geometry and visual demand. Curve radius and its reciprocal were found to be significantly related to visual demand in both on-road and test track studies. Small changes in visual demand were also found between types of curve pairs (S and broken back) with differing spacing between the curves. Visual demand was found to be a promising measure of effectiveness for use in studies of design consistency.
Supplemental Notes: This paper appears in Transportation Research Record No. 1737, Geometric Design and Effects on Traffic Operations 2000.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Wooldridge, M DFitzpatrick, KKoppa, RBauer, KPagination: p. 71-77
Publication Date: 2000
Serial: ISBN: 0309067405
Features: Figures
(4)
; Photos
(2)
; References
(5)
; Tables
(1)
TRT Terms: Uncontrolled Terms: Subject Areas: Design; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure
Files: TRIS, TRB, ATRI
Created Date: Jan 11 2001 12:00AM
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