In highway design, stopping sight distance (SSD) consists of two main distance components:
ALag distance and Braking distance
BOvertaking distance and Acceleration distance
CReaction distance and Passing distance
DHeadlight distance and Clear distance
Explanation
Stopping Sight Distance (SSD) = Perception-reaction distance (Lag distance = v * t) + Braking distance (v^2 / (2 * g * f)). Total SSD is the minimum distance required for a vehicle moving at design speed to stop safely.
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