Vehicle Speed Stopping Distance – Used in Traffic Accident Reconstructions

• Vehicle Speed (v)

  m/s km/hr ft/s mi/hr

• Coefficient of Friction (f)

• Grade of Road (G)

  %

  Downhill Uphill

• Perception/Reaction Time (t)

•  

• Stopping Sight Distance (in Meters)

  

• Stopping Sight Distance (in Feet)

  

Formula:

Stopping Distance =(v×t) + { v² / [2×g×(f±G)] }

  Where,

    g - gravity (9.8)

    v - Vehicle Speed

    t - perception Time

    G - Grade of Road

    f+G - Grade of Uphill

    f-G - Grade of Downhill

Online calculator for vehicle braking distance uses values of speed, friction, action reaction time, use this civil engineering calculator now.