The AASHTO stopping distance formula is as follows: s = (0.278 × t × v) + v² / (254 × (f + G)) where: s –Stopping distance in meters; t –Perception-reaction time in seconds; v –Speed of the car in km/h; G –Grade (slope) of the road, expressed as a decimal. Po...
The paper introduces implementation of highways' stopping sight distance (SSD) and decision sight distance (DSD) based on AASHTO modeling assumptions. SSD characterizes the necessary distance for highway vehicles to stop safely in front from an obstacle. SSD is a function of vehicle speed, perceptio...