Vehicle Dynamics
Stopping Distance Simulator
Examine stopping distances based on speed, braking deceleration, and human reaction lag. Adjust slope/grade and tire friction coefficients to observe safety envelopes.
Alert Factor
Normal
React = 1.5s
Tire-Road μ
0.80
Dry Asphalt
Output
CSV
Export ready
Parameters
Road Conditions
Animated speed sweep
Vehicle Dynamics Model
Reaction Distance
Dr = V * t_reaction
Braking Distance
Db = V^2 / [2 * g * (mu + G/100)]
Total Distance
Dt = Dr + Db
V is speed in m/s (velocity in km/h divided by 3.6).
G is road grade in percent. Positive grade aids braking, negative grade hinders it.
Reaction distance increases linearly with speed, while braking distance increases quadratically.
Stopping Distance Profile
Total Distance
90.8m
Reaction Dist
41.7m
Braking Dist
49.2m
Total Stop Time
5.04s
Stopping Distances vs Speed
Stopping Distance Chart
| Speed (km/h) | React Dist (m) | Braking Dist (m) | Total Dist (m) |
|---|---|---|---|
| 20 km/h | 8.3 m | 2 m | 10.3 m |
| 40 km/h | 16.7 m | 7.9 m | 24.5 m |
| 60 km/h | 25 m | 17.7 m | 42.7 m |
| 80 km/h | 33.3 m | 31.5 m | 64.8 m |
| 100 km/h | 41.7 m | 49.2 m | 90.8 m |
| 120 km/h | 50 m | 70.8 m | 120.8 m |
| 140 km/h | 58.3 m | 96.4 m | 154.7 m |
| 160 km/h | 66.7 m | 125.8 m | 192.5 m |
| 180 km/h | 75 m | 159.3 m | 234.3 m |
| 200 km/h | 83.3 m | 196.6 m | 280 m |
| 220 km/h | 91.7 m | 237.9 m | 329.6 m |
| 240 km/h | 100 m | 283.2 m | 383.2 m |
| 260 km/h | 108.3 m | 332.3 m | 440.7 m |