Results 221 to 230 of about 27,834 (245)

Analyzing the ability of crash-prone highways to handle stochastically modelled driver demand for stopping sight distance.

Accident Analysis and Prevention, 2019
Stopping Sight Distance (SSD) is the distance defined in most highway design guides as the distance required by drivers to safely come to a complete stop in case of an emergency.
S. Gargoum, K. El-Basyouny
semanticscholar   +1 more source

Sight Distance for Stop-Controlled Intersections Based on Gap Acceptance

Transportation Research Record: Journal of the Transportation Research Board, 2000
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, John M. Mason, Robert E. Brydia   +2 more
openaire   +1 more source

3D Calculation of Stopping-Sight Distance from GPS Data

Journal of Transportation Engineering, 2006
Sight distance is a key element in highway geometric design. Existing models for evaluating sight distance are applicable only to two-dimensional (213), separate horizontal, and vertical alignments or simple elements of these separate alignments (vertical curve, horizontal curve).
Girish Nehate, Malgorzata Rys
openaire   +1 more source

Three-Dimensional Model for Stop-Control Intersection Sight Distance

Journal of Transportation Engineering, 2004
Intersection 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, Essam Dabbour, Muhammad Z. A. Ali   +2 more
openaire   +1 more source

Cognitive Load Variability from Road Characteristics Should Influence a Safety Requirement for Vehicle Stopping Sight Distance

Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 2019
Current U.S. geometric road design standards are based on a prescribed value for a driver’s perception-reaction time (a constant value of 2.5 seconds), which represents the time necessary for a driver to safely stop the vehicle to avoid a crash (referred
Cody A. Pennetti, Kelsey Hollenback, Inki Kim, J. Lambert   +3 more
semanticscholar   +1 more source

Operating Speed on Crest Vertical Curves with Limited Stopping Sight Distance

Transportation Research Record: Journal of the Transportation Research Board, 2000
Horizontal 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, Kay Fitzpatrick, Charles W. Russell   +2 more
openaire   +1 more source

Aspects of Stopping-Sight Distance on Crest Vertical Curves

Journal of Transportation Engineering, 1998
In 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...
openaire   +1 more source

Balancing Urban Driveway Design Demands Based on Stopping Sight Distance

Transportation Research Record: Journal of the Transportation Research Board, 2009
Many 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, Ida van Schalkwyk, Robert Layton   +2 more
openaire   +1 more source

Stop-Controlled Intersection Sight Distance: Minor Road on Tangent of Horizontal Curve

Journal of Transportation Engineering, 2009
Sight 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
openaire   +1 more source

Design policies for sight distance at stop-controlled intersections based on gap acceptance

Transportation Research Part A: Policy and Practice, 1999
Abstract 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, John M. Mason, Robert E. Brydia   +2 more
openaire   +1 more source