Home » Highway Planning » Highway planning miscellaneous » Question
  1. A car is moving at a speed of 72 km/hr on road having 2% upward gradient. The driver applies brakes when he sees an obstruction. If his reaciton time is 1.5 seconds, assuming that the co-efficient of friction between the pavement and tyre as 0.15, calculate the distance traversed before the car finally stops.
    1. 24 m
    2. 150 m
    3. 1056 m
    4. 324 m
Correct Option: B

SSD = vt +
v2
(v in m / s)
2g(f + 0.01n)

= 0.278 vt +
v2
254(f + 0.01n)

= 0.278 × 72 × 1.5 +
(72)2
= 150 m
254(0.15 + 2 × 0.01)



Your comments will be displayed only after manual approval.