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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. - PowerPoint PPT Presentation
Citation preview
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 20June 15-18, 2008Jackson, Wyoming
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
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 082
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
MGS w/ 6-In. Curb (Test NPG-5)
3
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
Bumper Trajectory Test Set-up
4
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
Vehicle-Curb Test - MGSC-1 (2270P)
5
4,966 lbs62.2 mph25 deg
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
Vehicle-Curb Test - MGSC-2 (2270P)
6
4,966 lbs62.6 mph25 deg
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
Vehicle-Curb Test - MGSC-3 (1100C)
7
2,544 lbs61.6 mph25 deg
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
Wheel Damage - MGSC-3 (1100C)
8
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
Vehicle-Curb Test - MGSC-4 (2000P)
9
4,479 lbs62.5 mph25 deg
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
Curb-Lateral Coordinate System
10
Vehicle
Curb
Curb-Lateral Direction
Longitudinal Vehicle Path
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
Critical Override Impact Point
11
Critical Point
Critical Point
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
12
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
13
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
Predicted Safe Zones – 31” MGS
14
Bars Represent Safe Zones
2000P (MGSC-4)
1100C (MGSC-3)
2270P (MGSC-2)
2270P (MGSC-1)
Processed Curb-Lateral Distance (ft)
50 10 15 20 25
Unclear
Midwest Roadside Safety FacilityMidwest Roadside Safety Facility
Predicted Safe Zones – 37” MGS
15
0
2270P (MGSC-1)
2270P (MGSC-2)
1100C (MGSC-3)
2000P (MGSC-4)
Bars Represent Safe Zones
Processed Curb-Lateral Distance (ft)
252015105
UnclearUnclear