Civil Engineering MCQAE Level Civil Engineering
For speed 40 km/h, reaction time 2.5 s and coefficient of friction 0.35, stopping sight distance is nearly
Transportation EngineeringOriginal practiceMEDIUM
Choose the correct answer
A
45.8 m
B
91.6 m
C
68.7 m
D
22.9 m
Correct Answer
A. 45.8 m
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Stopping Sight Distance (SSD) = 0.278 × V × t + V² / (254 × f), where V is speed (km/h), t is reaction time (s) and f is coefficient of longitudinal friction. This gives SSD = 45.8 m m. IRC recommends minimum SSD to allow a driver to see and stop before hitting an obstruction.
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