What role does reaction time play in applying the brakes to your car in emergency situations? Assume your car is traveling at 100 kph when a pedestrian suddenly crosses the street in front of your car. How far will your car travel before you can apply the brakes? Show your solution.What is the likelihood of running over the pedestrian? (Assume that you can bring the car to a stop in 10 m once you step on the brakes when you are driving at 50 kph.)

What role does reaction time play in applying the brakes to your car in emergency situations? Assume your car is traveling at 100 kph when a pedestrian suddenly crosses the street in front of your car. How far will your car travel before you can apply the brakes? Show your solution.What is the likelihood of running over the pedestrian? (Assume that you can bring the car to a stop in 10 m once you step on the brakes when you are driving at 50 kph.)

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter3: Characteristics Of The Driver, The Pedestrian, The Bicyclist, The Vehicle, and The Road

Section: Chapter Questions

Problem 9P

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Similar questions

Assume your car is traveling at 100 kph when a pedestrian suddenly crosses the street in front of your car. How far will your car travel before you can apply the brakes? Show your solution. What is the likelihood of running over the pedestrian?(Assume that you can bring the car to a stop in 10 m once you step on the brakes when you are driving at 50 )
You are riding home from a party and the driver is drunk. The car is traveling at 60 mi/hr. Suddenly, a child steps into the road ahead. Since the driver is drunk his reaction time has been slowed by 1s. How far will the car travel before the driver begins to stop? (This is equal to the distance it will take to stop the car because the driver is drunk.)
A car was travelling at a speed of 50 mph (mi/hr). The driver saw a road block 80 meters ahead and stepped on the brake causing the car to decelerate uniformly at 10 m/s2. Find the distance (in m) from the roadblock to the point where the car stopped. Assume perception reaction time is 2 seconds.
Problem: 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^2. 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 20 ft/s^2. (Figure 1_ Question: Determine the minimum distance d between the cars so as to avoid a collision. Express your answer to three significant figures and include the appropriate units.
Two cars A and B are stopped at a traffic light, waiting for the light to change from red to green, see Figure 3. Car B is 6 meters behind car A. When the light turns green, car A starts accelerating at a rate of 0.3 m / sec2, while car B departs 2 seconds later and accelerates at a rate of 0.8 m / sec2. Determine the speed each car was carrying when they are side by side.
A car was traveling at a speed of 50mph. The driver saw a road block 80 m ahead and stepped on the brake causing the car to decelerate uniformly at 10 m/?2. a.) Find the distance travelled by the car during perception reaction time.b.) Find the distance travelled by the car from the moment the driverstepped on the brake until the car stops.c.) Find the distance from the roadblock to the point where the car stopped. Assume perception reaction time is 2 seconds.
Two people on bikes are separated by 350 meters. Person A starts riding north at a rate of 5 m/sec and 7 minutes later Person B starts riding south at 3 m/sec. At what rate is the distance separating the two people changing 25 minutes after Person A starts riding?
Calculate the coefficient of return (e) for a ball thrown with an initial velocity of 5 m/s if its angle with the wall before the collision is 60 degrees and the angle with the wall after the collision is 45 degrees.
it takes about 3 s for a driver having 0.1% alcohol in his system to react to a situation to avoid a collision. if such drivers are traveling on a straight road at 40.11ft/s and their cars can decelerate at 2.714ft/s^2, determine the shortest stopping distance d (in feet) from the moment they see the pedestrians.
Suppose you want to design an air – bag system that can protect the driver in a head on collision at a speed of 100 kph. Estimate how fast the air bag must inflate to effectively protect the driver. Assume the car crumples upon impact over a distance of about 1m. How does the use of the seat belt help the driver?
You are to determine the duration of the yellow light at a highway intersection. Assume that cars will be approaching the intersection traveling at 70 mph, and that the reaction time of the driver is 2.5 sec and that cars achieve a deceleration of 1/8 of the gravitational acceleration. if g=32.2 fps^2, a. how long must the traffic light remain yellow to allow drivers to come to stop before the traffic light turns red? b. what is the minimum distance of a car from the intersection when the lightturns yellow to ensure that it comes to a full stop before the intersection?
An automobile starting from rest speeds up to 40 meters per seconds with a constant acceleration of 4 meter per seconds square, runs at this speed for a time, and finally comes to rest with a deceleration of 5 meters per second square. If the total distance traveled is 1000 meters, find the (a) distance traveled covered during the acceleration, (b) distance traveled at constand speed, and (c) the total time of travel.