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Calculate Stopping Sight Distance:
 
Calculation:
Designer/Checker:
 
Input:
 

 
 
Design Speed (MPH - mph or kph)
Vehicle deceleration rate (a - ft/s^2 or m/s^2, AASHTO default value is 11.2 ft/s^2)
Grade of Road ( G - %, downhill is negative)
Braking reaction perception time (tp - sec, AASHTO recommends 2.5 sec)

     
   
   
Output:  
 
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Stopping Sight Distance, S =
 
 
 



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