Speed Hump Design Calculator
Design speed humps, speed tables, or speed cushions with recommended dimensions and spacing for target speed reduction on residential streets.
Inputs
mph
mph
ft
%
Results
Device Height
3 in
Total Length
12 ft
Ramp Length6 ft
Flat Top Length0 ft
Device Width26 ft
Recommended Spacing350 ft
Speed Reduction10 mph
Expected Speed25 mph
Emergency CompatibilityOK
How to Use This Calculator
- Enter Device Type, Speed Hump (sinusoidal), and Speed Table (flat top).
- Set Speed Cushion (emergency-friendly), Target Speed, and Current 85th % Speed.
- Adjust Road Width, Downhill Grade as needed.
- Review Device Height (in) and Total Length (ft).
- Use Ramp Length (ft) and Flat Top Length (ft) to inform your decision.
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