Hillcrests : problems of vertical line of sight and visibility.

Author(s)
Hills, B.L.
Year
Abstract

Stopping and passing sight distance criteria for the vertical curvature of roads at hillcrests are compared. Considered are (1) the visibility of an object coming into view being a function of the area of the object, the contrast between the object and its background, and the light level; (2) for stopping sight distances the effective driver eye height at night is the headlamp height, and (3) visibility in the meeting-vehicle situation at night time and at hillcrests can be considerably less than the minimum stopping sight distances.

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Publication

Library number
B 13073 (In: B 13070 S) /21/ IRRD 219984
Source

In: Geometric road design standards : proceedings of the symposium on methods for determining geometric road design standards, Helsingor, Denmark, May 10-12, 1976, p. 46-51, 3 tab., 9 ref.

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