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Three-Dimensional Model for Stop-Control Intersection Sight Distance
Journal of Transportation Engineering, 2004Intersection sight distance (ISD) is the distance to be provided at intersections between minor and major roads. Current AASHTO policy provides an equation and charts for the required at-grade ISD so that a driver on the minor road can depart (crossing, turning left or right) safely, even though an approaching vehicle on the major road comes into view ...
Said M. Easa +2 more
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Safety Effects of Limited Stopping Sight Distance on Crest Vertical Curves
Transportation Research Record: Journal of the Transportation Research Board, 2000Previous studies that examined the relationship between stopping sight distance and safety have been inconclusive and inconsistent; however, the fact that a relationship has not been established does not necessarily imply that stopping sight distance is not a contributing factor in some crashes.
Kay Fitzpatrick +2 more
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Aspects of Stopping-Sight Distance on Crest Vertical Curves
Journal of Transportation Engineering, 1998In the present study a simple methodology is developed, by which the values of available sight distance, for any driver location on crest vertical curves (CVCs), can be precisely and directly calcu...
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Operating Speed on Crest Vertical Curves with Limited Stopping Sight Distance
Transportation Research Record: Journal of the Transportation Research Board, 2000Horizontal and vertical elements of a highway are designed based on an assumed design speed. This concept was developed in the 1930s as a mechanism for designing rural alignments to permit most drivers to operate uniformly at their desired speed. In 1938, AASHO recognized that drivers select a speed influenced by the roadway environment instead of an ...
Daniel B. Fambro +2 more
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Balancing Urban Driveway Design Demands Based on Stopping Sight Distance
Transportation Research Record: Journal of the Transportation Research Board, 2009Many roadways in urban areas, especially dense commercial areas, are subjected to on-street and adjacent off-street parking demands; local access through driveways is an essential component of these complex urban corridors. Vehicles entering and exiting these driveways–-and their interaction with parked cars, other moving motorized vehicles, bicycles ...
Karen Dixon +2 more
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Stop-Controlled Intersection Sight Distance: Minor Road on Tangent of Horizontal Curve
Journal of Transportation Engineering, 2009Sight distance at the intersection of a minor road (controlled by a stop sign) and a major road is an important element of road safety. Several models have been recently developed for the analysis of sight distance at intersections involving horizontal curves on the major road.
M. Z. A. Ali, Said M. Easa, M. Hamed
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Design policies for sight distance at stop-controlled intersections based on gap acceptance
Transportation Research Part A: Policy and Practice, 1999Abstract The current AASHTO policy for sight distance at stop-controlled intersections is based on a model of the acceleration performance of a minor-road vehicle turning left or right onto a major road and the deceleration performance of the following major-road vehicle.
Douglas W. Harwood +2 more
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