Car Ais traveling at a location where the speed limit is 100 km/h. The police officer in car Pobserves this speed via radar. The driver of car Ais traveling at v, = 130 km/h as it passes P. but over the next 4.2 seconds, the car uniformly decelerates to the speed limit of 100 km/h, and after that the speed limit is maintained. At the moment whenA passes P, the police car begins to accelerate at the constant rate of 4.5 m/s until a speed of 161 km/h is achieved, and that speed is then maintained. Determine the distance s required for the police officer to overtake car A. Answer:s-i

Car Ais traveling at a location where the speed limit is 100 km/h. The police officer in car Pobserves this speed via radar. The driver of car Ais traveling at v, = 130 km/h as it passes P. but over the next 4.2 seconds, the car uniformly decelerates to the speed limit of 100 km/h, and after that the speed limit is maintained. At the moment whenA passes P, the police car begins to accelerate at the constant rate of 4.5 m/s until a speed of 161 km/h is achieved, and that speed is then maintained. Determine the distance s required for the police officer to overtake car A. Answer:s-i

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 10P

See similar textbooks

Similar questions

Repeat the previous problem, only now the driver of car A is traveling at VA = 130 km/h as it passes P, but over the next 5 seconds, the car uniformly decelerates to the speed limit of 100 km /h, and after that the speed limit is maintained. If the motion of the police car P remains as described in the previous problem, determine the distance required for police officer to overtake car A. Ans. 330 m
Car A is traveling at a constant speed vA = 127 km/h at a location where the speed limit is 100 km/h. The police officer in car P observes this speed via radar. At the moment when A passes P, the police car begins to accelerate at the constant rate of 5.0 m/s2 until a speed of 171 km/h is achieved, and that speed is then maintained. Determine the distance s required for the police officer to overtake car A. Neglect any nonrectilinear motion of P.
A motorist is traveling at v0 = 64 km/h when she observes that a traffic light x = 327m ahead of her turns red. The traffic light is timed to stay red for 27s. If the motorist wishes to pass the light without stopping just as it turns green again, determine (a) the required uniform deceleration of the car and (b) the speed of the car as it passes the light.
a driver is traveling at 65 mi/h rounds a curve on a level grade to see a truck overturned across the roadway at a distance of 350 ft. if the drivers is able to decelerate at a rate of 10 ft/s2. At what speed will the vehicle hit the truck? Plot the result for reaction times ranging from 0.5 to 5 seconds in increments of 0.5 seconds
Two automobiles A and B are approaching each other in adjacent highway lanes. At t=0, A and B are 1km apart, their speeds are 108km/h and 63km/h and they are at the points P and Q respectively. Knowing that A passes point Q 40s after B was there and B passes P 42s after A was there, determine the uniform acceleration of A and B, when the vehicles pass each other and the speed of B at that time.
Two vehicles, one operated by a human and the other computer controlled, are traveling on a level highway. If the autonomous vehicle is traveling at 70 mi/h, and it receives information at a frequency of 10Hz to respond, what is the maximum speed the human-controlled vehicle can travel and have a practical stopping distance that does not exceed that of the autonomous vehicle? (Assume that grade is zero, driver’s reaction time is 1.5s and autonomous vehicle can decelerate at 15.5ft/s2 )?
The car is traveling at a speed of 75 mi/hr as it approaches point A. Beginning at A, the car decelerates at a constant 7.4 ft/sec2 until it gets to point B, after which its constant rate of decrease of speed is 3.7 ft/sec2 as it rounds the interchange ramp. Determine the magnitude of the total car acceleration (a) just before it gets to B, (b) just after it passes B, and (c) at point C.
The driver of the vehicle on a level road determined that she could increase her speed from rest to 51 kph in 36.80 seconds and from rest to 66 kph in 96.80 seconds. If it can be assumed that the acceleration of the vehicle takes the form du/dt =  - βut where u is the vehicle speed in m/sec. Determine the maximum acceleration of the vehicle.
Car A starts from rest at t = 0 and travels along a straight road with a constant acceleration of 6 ft/s^2 until it reaches a speed of 80 ft/s. Afterwards it maintains this speed. Also, when t = 0, car B located 6000 ft down the road is traveling towards A at a constant speed of 60 ft/s. Determine the distance traveled by car A when they pass each other.
A vehicle is moving along a straight line having an initial speed of 10 m/s. It is experiencing a deceleration of -0.5v2 m/s2 . Determine the distance travelled by the vehicle after three seconds.
A car (SUV) is to overtake a bus as it enters an acceleration lane. The speed of the SUV is 80 kph initially. The bus is at the same speed as the SUV. Given the perception reaction time as 2.70 seconds and the average acceleration of the vehicle is 2.55 m/s2, solve the following: a. The distance (in ft) traversed during the perception and reaction time and during the initial acceleration to the point of encroachment on the left lane.b. The distance (in yard) travelled by the passing vehicle occupies the left lane if the opposing vehicle travelled at 75 kph and the time for the passing vehicle to occupy the left lane is 20 seconds. c. The minimum passing sight distance (in m) if the SUV's velocity to overtake the bus is 55.92 miles per hour while the distance between the opposing vehicle and the SUV after its maneuver is 295 ft. The time for the SUV to occupy the left lane is 0.23 minutes.
For the instant represented, car A is rounding the circular curve at a constant speed of 23 mi/hr, while car B is slowing down at the rate of 4.5 mi/hr per second. Determine the magnitude of the acceleration that car A appears to have to an observer in car B.