Results 261 to 270 of about 1,837,852 (291)

Stopping Sight Distance Requirements for Basic Turbo Roundabouts

Journal of Transportation Engineering Part A: Systems
Said M. Easa
exaly   +2 more sources

Reliability of sight distance at stop-control intersections

Proceedings of the Institution of Civil Engineers - Transport, 2016
The American Association of State Highway and Transportation Officials presents guidelines for intersection sight distance (ISD) based on extreme values of the component design variables such as speed and time gap. The guidelines for a stopped vehicle at a stop-control intersection on a minor road assume that the component design variables are ...
Said M. Easa, Altaf Hussain
openaire   +1 more source

Stopping Sight Distance and Horizontal Sight Line Offsets at Horizontal Curves

Transportation Research Record: Journal of the Transportation Research Board, 2014
Criteria for the design of horizontal curves implicitly rely on design speed to produce safe and efficient designs, particularly for horizontal sight line offsets and stopping sight distances. Current design guidance provides a method for calculating minimum horizontal sight line offsets that is accurate and valid only when both driver and object are ...
Jonathan S. Wood, Eric T. Donnell
openaire   +1 more source

Required Stopping Sight Distance on Crest Vertical Curves

Journal of Transportation Engineering, 2001
Required stopping sight distance (SSD), used to calculate the minimum rate of vertical curvature or the minimum length of a crest vertical curve (CVC), is usually calculated on the assumption that the grade of the braking section is zero (G = 0). This assumption is not the worst case and may lead to the selection of a CVC on which there is a segment ...
Ioannis Taignidis, George Kanellaidis
openaire   +1 more source

A review of stopping sight distance in road design guidelines

Proceedings of the Institution of Civil Engineers - Transport, 2013
A fundamental principle of international road geometric design guidelines and handbooks is that along a roadway, the available sight distance should be sufficient to enable a driver, travelling at a reasonable speed, to stop before reaching a stationary object on his path.
Nikolaos Roussiamanis, Antonis Kaltsounis, Sophia Vardaki, George Kanellaidis   +3 more
openaire   +1 more source

Driver Braking Performance in Stopping Sight Distance Situations

Transportation Research Record: Journal of the Transportation Research Board, 2000
Assumed driver braking performance in emergency situations is not consistent in the published literature. A 1955 study stated that in an emergency situation “it is suspected that drivers apply their brakes as hard as possible.” This idea differs from a 1984 report that states drivers will “modulate”their braking to maintain ...
Daniel B. Fambro, Rodger J. Koppa, Dale L. Picha, Kay Fitzpatrick   +3 more
openaire   +1 more source

Cyclist Perception–Reaction Time and Stopping Sight Distance for Unexpected Hazards

Journal of Transportation Engineering Part A: Systems
Alexander York Bigazzi, Steve Martin
exaly   +2 more sources

Three-Dimensional Stop-Control Intersection Sight Distance

Transportation Research Record: Journal of the Transportation Research Board, 2006
Intersection sight distance is an important design element. A stopped vehicle on the minor road needs sufficient sight distance to depart (cross, turn left, or turn right) safely, even though an approaching vehicle on the major road comes into view. Current AASHTO policy assumes that both minor and major roads are straight and intersect at right angles.
Said M. Easa, Zain A. Ali
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

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