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?
Chapter2: Loads On Structures
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Problem 1P
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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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