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PEDESTRIAN - BICYCLE CRASH INVESTIGATION MATH PROJECT 1 The driver of a vehicle makes a hard application of brakes to avoid a pedestrian entering into the roadway. The vehicle skidded 103 feet (31.39 meters) to a stop on a roadway with an adjusted deceleration factor of .70. The pedestrian was struck 37 feet (11.27 meters) into the skid. It was determined that the pedestrians of the same age group have and average walking speed of 3.8 miles per hour (6.11 kilometers per hour). 1. What was the speed of the vehicle at the time the driver applied the brakes? 2. What was the velocity of the vehicle at the time the driver applied the brakes? 3. What was the speed of the vehicle at the time of impact with the pedestrian? 4. What was the velocity of the vehicle at the time of impact with the pedestrian? 5. How long (seconds) did it take the vehicle to skid to impact with the pedestrian? 6. How long did it take the vehicle to skid to a stop on the roadway? 7. How far from impact was the vehicle when the driver first perceived the pedestrian if the driver needed 1.5 seconds of perception/reaction (P/R) time? 8. What is the total time for the driver to reach the impact from the start of his perception and reaction time? 9. How far from impact was the pedestrian when he was first perceived by the driver of the vehicle? 10. What is the total time for the pedestrian to reach the impact from the start of the drivers P/R time?

PEDESTRIAN - BICYCLE CRASH INVESTIGATION MATH PROJECT 1 The driver of a vehicle makes a hard application of brakes to avoid a pedestrian entering into the roadway. The vehicle skidded 103 feet (31.39 meters) to a stop on a roadway with an adjusted deceleration factor of .70. The pedestrian was struck 37 feet (11.27 meters) into the skid. It was determined that the pedestrians of the same age group have and average walking speed of 3.8 miles per hour (6.11 kilometers per hour). 1. What was the speed of the vehicle at the time the driver applied the brakes? 2. What was the velocity of the vehicle at the time the driver applied the brakes? 3. What was the speed of the vehicle at the time of impact with the pedestrian? 4. What was the velocity of the vehicle at the time of impact with the pedestrian? 5. How long (seconds) did it take the vehicle to skid to impact with the pedestrian? 6. How long did it take the vehicle to skid to a stop on the roadway? 7. How far from impact was the vehicle when the driver first perceived the pedestrian if the driver needed 1.5 seconds of perception/reaction (P/R) time? 8. What is the total time for the driver to reach the impact from the start of his perception and reaction time? 9. How far from impact was the pedestrian when he was first perceived by the driver of the vehicle? 10. What is the total time for the pedestrian to reach the impact from the start of the drivers P/R time?

Traffic and Highway Engineering
Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter6: Fundamental Principles Of Traffic Flow
Section: Chapter Questions
Problem 9P
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PEDESTRIAN - BICYCLE CRASH INVESTIGATION MATH PROJECT 1 The driver of a vehicle makes a hard application of brakes to avoid a pedestrian entering into the roadway. The vehicle skidded 103 feet (31.39 meters) to a stop on a roadway with an adjusted deceleration factor of .70. The pedestrian was struck 37 feet (11.27 meters) into the skid. It was determined that the pedestrians of the same age group have and average walking speed of 3.8 miles per hour (6.11 kilometers per hour). 1. What was the speed of the vehicle at the time the driver applied the brakes? 2. What was the velocity of the vehicle at the time the driver applied the brakes? 3. What was the speed of the vehicle at the time of impact with the pedestrian? 4. What was the velocity of the vehicle at the time of impact with the pedestrian? 5. How long (seconds) did it take the vehicle to skid to impact with the pedestrian? 6. How long did it take the vehicle to skid to a stop on the roadway? 7. How far from impact was the vehicle when the driver first perceived the pedestrian if the driver needed 1.5 seconds of perception/reaction (P/R) time? 8. What is the total time for the driver to reach the impact from the start of his perception and reaction time? 9. How far from impact was the pedestrian when he was first perceived by the driver of the vehicle? 10. What is the total time for the pedestrian to reach the impact from the start of the drivers P/R time?
Transcribed Image Text:PEDESTRIAN - BICYCLE CRASH INVESTIGATION MATH PROJECT 1 The driver of a vehicle makes a hard application of brakes to avoid a pedestrian entering into the roadway. The vehicle skidded 103 feet (31.39 meters) to a stop on a roadway with an adjusted deceleration factor of .70. The pedestrian was struck 37 feet (11.27 meters) into the skid. It was determined that the pedestrians of the same age group have and average walking speed of 3.8 miles per hour (6.11 kilometers per hour). 1. What was the speed of the vehicle at the time the driver applied the brakes? 2. What was the velocity of the vehicle at the time the driver applied the brakes? 3. What was the speed of the vehicle at the time of impact with the pedestrian? 4. What was the velocity of the vehicle at the time of impact with the pedestrian? 5. How long (seconds) did it take the vehicle to skid to impact with the pedestrian? 6. How long did it take the vehicle to skid to a stop on the roadway? 7. How far from impact was the vehicle when the driver first perceived the pedestrian if the driver needed 1.5 seconds of perception/reaction (P/R) time? 8. What is the total time for the driver to reach the impact from the start of his perception and reaction time? 9. How far from impact was the pedestrian when he was first perceived by the driver of the vehicle? 10. What is the total time for the pedestrian to reach the impact from the start of the drivers P/R time?
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