(b) Two cars are approaching from opposite directions of a road with a gradientof 2% with velocities of 90 km/hr and 75 km/hr respectively. Calculate theminimum sight distance required to avoid head-on-collision of both the cars.Reaction time of the driver is 2.5 sec and the coefficient of friction is 0.35. (8)CE 1815043[Turn over

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Answered: (b) Two cars are approaching from…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Q- Determine the minimum non-passing sight distance that should be provided for a vehicle coming down a 6% gradient. Given that- design speed V=56 kmph Reaction time t=2 s Coefficient of friction f=0.5
9.An alert driver (with a reaction time 0.5 second) is driving uphill on a 4% grade at 36 km/h on a dry pavement when suddenly a person steps from behind a parked car in the path of the driver. The coefficient of friction of the pavement is 0.7. How long is the stopping distance of the car? A. 12.73m B. 11.89m C. 21.86m D. 20.24m
question -6c,
Transport.,
b. Car B is traveling a distance d ahead of car A. Both cars are traveling at 60 ft/s when the driver of B suddenly applies the brakes, causing his car to decelerate at 12 ft/s?. It takes the driver of car A 0.75s to react (this is the normal reaction time for drivers). When he applies his brakes, he decelerates at 15 ft/s? . Determine the minimum distance d between the cars so as to avoid a collision.
. A driver traveling at 60 mph rounds a curve on a level grade to see a truck overturned across a roadway at a distance of 400 ft. Is the vehicle able to avoid hitting the truck? If not, how fast is the vehicle traveling when it strikes the truck? Assume typical reaction time and rate of deceleration. (Be sure to consider if you should apply stopping sight distance or decision sight distance.)
Car B is traveling a distance d ahead of car A. Both cars are traveling at 60 ft/s when the driver of B suddenly applies the brakes, causing his car to decelerate at 12 ft/s?. It takes the driver of car A 0.75 s to react (this is the normal reaction time for drivers). When he applies his brakes, he decelerates at 15 ft/s?. Determine the minimum distance d between the cars so as to avoid a collision. -d -
Pb-1
1. A car is approachin an intersection with velocity 35 mph. When the car is at a distance of 200 ft from the intersection, the signal turned yellow. If the driver decides to break, will he be able to stop safely? The driver's reaction time is 1.5 s. Assume the road surface as leveled. The maximum braking effort is applied. Will your answer change, if the grade of the road surface is downhill 3%? A car is at a distance of 200 ft from an intersection stop line when the signal turned yellow. What should be the minimum speed of the car (miles/hour) if the driver decides to apply brake and is just able to stop at the line? Use reaction time of 1.5 s and the road surface has zero grade.
driver to safely stop before he would strike the object. 3. Refer to the following illustration; veh#2 is driving with the speed of 60mph, following veh#1 whose speed is 50mph. The lead car suddenly breaks to a stop within a 278 ft distance. Assume the friction factor is unknown, but both cars operate with the same deceleration rate, and veh#2 has a default reaction-perception time by AASHTO. If the roadway is level, estimate the minimum distance between the two cars so the collision can be prevented. 60 mph 50 mph 2 Sf stop 1 12×1) 278 ft
A driver travelling at 50mph sees a hazard (boulder) at a certain distance ahead. The driver then applies the brakes immediately (PIEV) time is 2 seconds and begins slowing the vehicle at 10m/sec? (decelerating). If the distance from the stopping point to avoid hitting the boulder is 10.28m, how far was the car from the boulder upon perception?
1. The distance travelled by a vehicle during perception-reaction time is 55.56m. If this vehicle is travelling on a 4% downhill road section with a design speed of 80 kph and a coefficient of friction with the tires of 0.35, what would be the braking distance required if the available stopping sight distance is 136.74m.?

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