Q2/ One vehicle is following another on a two lanes, two way highway at night, according to the rule of thumb which allow one car length of spacing per 10 km/hr of speed, if both vehicles are traveling of 100 km/hr and lead car crashes in to the rear of unlighted parked truck, at what speed will the rear vehicle hit the wreckage, assume the perception reaction time of 0.5 sec. and the coefficient of braking friction is 0.5,assume length of vehicle is 3.5

Q2/ One vehicle is following another on a two lanes, two way highway at night, according to the rule of thumb which allow one car length of spacing per 10 km/hr of speed, if both vehicles are traveling of 100 km/hr and lead car crashes in to the rear of unlighted parked truck, at what speed will the rear vehicle hit the wreckage, assume the perception reaction time of 0.5 sec. and the coefficient of braking friction is 0.5,assume length of vehicle is 3.5

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter20: Design Of Rigid Pavements

Section: Chapter Questions

Problem 16P

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part a, assuming decelerat on rate is unknown bu the friction factor=0.2. 2. A driver traveling down a 4% grade collides with a roadside object. The roadway has a posted speed limit is 60mph. The driver mentioned he strictly followed the speed limit. The accident investigation team indicates: braking skid marks started 300 ft before the struck object. a. If the friction factor was measured as 0.2, estimate the speed of the vehicle when it struck the object. b. Estimate the minimum required friction factor so the 300 ft skid marks can allow the driver to safely stop before he would strike the object.
A driver is traveling at 90 mi/h down a 3% grade on good, wet pavement. An accident investigation team noted that braking skid marks started 410 ft before a parked car was hit at an estimated 45 mi/h. Ignoring air resistance, and using theoretical stopping distance, a. If the car’s antilock braking system was effective (no sliding wheels on the pavement), what would the crash speed be?
One vehicle is following another on a two-lane, two-way highway at night according to the safe-driving “rule-of-thumb” of one car length spacing for each 10 mph of speed. Both of you traveling at 70 mph when the lead vehicle crashes into an unlighted disable vehicle. Assuming that one car length is 20 feet, f=0.28 and PIEV time is 1.5 for you, will you hit the lead vehicle? If so at what speed will you be going?
The length of a highway is 550 m when a head-on vehicle collision occurred. Police reports show that neither human error nor vehicle malfunction was the cause of the collision. Check if the length of the highway is sufficient for an overtaking maneuver. Accident Report: -Speed of Overtaking Car = 96 kph -Speed of Overtaken Car= 88 kph -Perception-reaction time = 2.5 sec -Average acceleration = 2.4 m/sec? -Time of the passing vehicle occupying the left lane (10.4 sec) - Distance between the passing vehicle at the end of its maneuver and the opposing vehicle= 84 m
Consider the following data: Design speed = 96 kmph Speed of overtaken vehicle = 80 kmph Reaction time for overtaking = 2 sec Acceleration = 2.5 kmph/sec The safe overtaking sight distance on a two-way traffic road way be nearly
What is the braking distance (ft) when the design speed is 65 mph, assuming the AASHTO recommended deceleration rate and perception-reaction time. Response Feedback: braking distance = 1.075 (V²/a)
The length of a highway is 550 m when a head-on vehicle collision occurred. Police reports show that neither human error nor vehicle malfunction was the cause of the collision. Check if the length of the highway is sufficient for an overtaking maneuver. Accident Report: -Speed of Overtaking Car = 96 kph -Speed of Overtaken Car= 88 kph -Perception-reaction time 2.5 sec -Average acceleration = 2.4 m/sec2 -Time of the passing vehicle occupying the left lane (10.4 sec) - Distance between the passing vehicle at the end of its maneuver and the opposing vehicle= 84 m
A car is traveling up a 3% grade, with the speed of 85mph, on a road that has good, wet pavement. A deer jumps out onto the road and the driver applies the brakes 290-ft from it. The driver hits the deer at a speed of 20mph.If the driver did not have antilock brakes, and the wheels were locked the entire distance, would a deer-impact speed of 20mph be possible? (Hint: check the braking efficiency) [Use Theoretical Stopping Distance]
The design speed for a two-way traffic on a two way lane road is 50 kmph. What is the value of safe stopping sight distance, if co-efficient of friction is 0.37 and reaction time of driver as 2.5 sec?
QUESTION 7 What is the braking distance (ft) when the design speed is 65 mph, assuming the AASHTO recommended deceleration rate and perception-reaction time.
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.
A driver is traveling at 90 mi/h down a 3% grade on good, wet pavement. An accident investigation team noted that braking skid marks started 410 ft before a parked car was hit at an estimated 45 mi/h. Ignoring air resistance, and using theoretical stopping distance, what was the braking efficiency of the car? If the car’s antilock-braking system was effective (no sliding wheels on the pavement), what would the crash speed be?