physics of cycling safety
DESCRIPTION
Physics of Cycling Safety. L. Van Warren MS CS, AE Jan 2010. Sources of Cycling Danger. Collision with Car or Truck Collision with Cyclist or Fall Mechanical Failure, Flat Tire, Pothole Metabolic Failure. Collision Kinetic Energy @ 45 mph. Collision Kinetic Energy @ 45 mph. - PowerPoint PPT PresentationTRANSCRIPT
Physics ofCycling Safety
L. Van Warren MS CS, AE
Jan 2010
Sources of Cycling DangerCollision with Car or Truck
Collision with Cyclist or Fall
Mechanical Failure, Flat Tire, Pothole
Metabolic Failure
Jogger Cyclist Car Truck 2 5 1,521
943,722
(Vertical feet)
Collision Kinetic Energy @ 45 mph
Collision Kinetic Energy @ 45 mph
Jogger Cyclist Car 2 5
1,521
(Vertical feet)
Collision Kinetic Energy @ 12 mph
Jogger Cyclist
2
5 (Vertical feet)
(Vertical feet)
Principle Collision ConfigurationsSide-swiped from behind
Large difference in velocity.On the “reveal” in a line of cars.Rear-view mirror makes huge difference!
Head on with oncoming Car Making Left Turn
Intersections!!
Hot Spot #1: Cross & LaHarpe
#2: Markham & Rodney Parham
#3: Markham & Hughes
#4: Chenal Parkway
ConclusionsSeparate Joggers and Cylists from Cars and Trucks
Bike paths should be widened and smoothed.
Transitions should be free of “lips”, ADA-compatible.
Educate higher energy to yield to those with less.
Pay attention to hot spots!