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Physics of Cycling Safety

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.

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Physics of Cycling Safety

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  1. Physics ofCycling Safety L. Van Warren MS CS, AE Jan 2010

  2. Sources of Cycling Danger • Collision with Car or Truck • Collision with Cyclist or Fall • Mechanical Failure, Flat Tire, Pothole • Metabolic Failure

  3. Collision Kinetic Energy @ 45 mph

  4. Collision Kinetic Energy @ 45 mph (Vertical feet)

  5. Collision Kinetic Energy @ 12 mph (Vertical feet) (Vertical feet)

  6. Principle Collision Configurations • Side-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!!

  7. Hot Spot #1: Cross & LaHarpe

  8. #2: Markham & Rodney Parham

  9. #3: Markham & Hughes

  10. #4: Chenal Parkway

  11. Conclusions • Separate 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!

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