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Bumper Trajectories During High-Speed Impacts with 6-in. Curbs

Bumper Trajectories During High-Speed Impacts with 6-in. Curbs. Ronald K. Faller, Ph.D., P.E. Midwest Roadside Safety Facility (MwRSF) University of Nebraska-Lincoln TRB Committee AFB 20 June 15-18, 2008 Jackson, Wyoming. Introduction.

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Bumper Trajectories During High-Speed Impacts with 6-in. Curbs

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  1. Bumper Trajectories During High-Speed Impacts with 6-in. Curbs Ronald K. Faller, Ph.D., P.E. Midwest Roadside Safety Facility (MwRSF) University of Nebraska-Lincoln TRB Committee AFB 20 June 15-18, 2008 Jackson, Wyoming

  2. Introduction • MGS placed 6 in. (mid-face) behind 6-in. high, AASHTO Type B curb met TL-3 of NCHRP 350 • Pooled Fund States sponsored study to determine performance limits of MGS behind 6-in. curbs • allow for some variability in MGS placement • allow for sidewalk placement in front of MGS • reduce snow plow impacts with rail & resulting damage • determine lateral offset when MGS needs to be raised • Obtain bumper trajectories for curb impacts with pickup trucks and small cars • Evaluate critical MGS offsets using MASH 08

  3. MGS w/ 6-In. Curb (Test NPG-5)

  4. Bumper Trajectory Test Set-up

  5. Vehicle-Curb Test - MGSC-1 (2270P) 4,966 lbs 62.2 mph 25 deg

  6. Vehicle-Curb Test - MGSC-2 (2270P) 4,966 lbs 62.6 mph 25 deg

  7. Vehicle-Curb Test - MGSC-3 (1100C) 2,544 lbs 61.6 mph 25 deg

  8. Wheel Damage - MGSC-3 (1100C)

  9. Vehicle-Curb Test - MGSC-4 (2000P) 4,479 lbs 62.5 mph 25 deg

  10. Curb-Lateral Coordinate System

  11. Critical Override Impact Point Critical Point Critical Point

  12. Predicted Safe Zones – 31” MGS

  13. Predicted Safe Zones – 37” MGS

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