Transportation Engineering2D
Highway Geometric Design - Theory & Concepts - Sight Distance
Principles of cross-section elements, horizontal alignment, and vertical alignment.
Open the complete lessonStopping Sight Distance (SSD) Simulator
Adjust the parameters to see how velocity, reaction time, road friction, and grade affect the total distance required for a vehicle to come to a complete stop.
60 km/h
2.5 s
0.35
(Lower = wet/slippery, Higher = dry/rough)
0%
(- = Downgrade, + = Upgrade)
Reaction Dist.
41.7 m
Braking Dist.
40.5 m
Total SSD
82.1 m
Visual Representation
250m Scale