Highway And Railroad Engineering2D
Geometric Design: Vertical Alignment - Theory & Concepts - Sight Distance
Design of crest and sag vertical curves, calculating elevations, and ensuring adequate sight distance over hills and under bridges.
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