This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Vehicle Controllability in a Pavement/Shoulder Edge Climb Maneuver
Annotation ability available
Sector:
Language:
English
Abstract
This paper describes the results of a test program to evaluate various roadway disturbances present in the driving environment. The specific objectives were to pare down the list of possible roadway disturbances to the worst cases, identify handling problem areas, find meaningful response parameters and compare responses of different vehicles which might influence the results.
The program provided an accident data analysis, survey questionnaire results and full scale test results which found the pavement/shoulder dropoff (requiring an edge climb maneuver) to be the most severe and most likely disturbance to result in lane exceedance. This occurs when the vehicle is scrubbing one set of tires on the shoulder edge (or encountering the edge at too shallow an angle for climb), thereby climb), thereby requiring the driver to apply a large steering deflection to get the car to climb back onto the pavement. In this case the vehicle will “spin out” if the speed is high enough.
Road tests were performed with four passenger cars in an attempt to obtain objective vehicle response performance measures as a function of vehicle type, shoulder height and tire parameters (construction, wear and pressure). The tests were divided into two categories: closed loop and open loop. In the closed-loop tests the effects of the driver, the vehicle, and the environment were all included, whereas in the open-loop tests only the basic vehicle response to the shoulder climb was considered. Results derived from these test procedures are discussed in the paper.
Recommended Content
| Technical Paper | Lateral/Directional Stability of Tow Dolly Type Combination Vehicles |
| Technical Paper | Motorcycle Rider Inputs During Typical Maneuvers |
| Technical Paper | Automobile In-Use Tire Inflation Survey |
Authors
Citation
Klein, R. and Johnson, W., "Vehicle Controllability in a Pavement/Shoulder Edge Climb Maneuver," SAE Technical Paper 780620, 1978, https://doi.org/10.4271/780620.Also In
References
- Tharp K. J. Calderwood T. G. Downing J. J. Fell J. C. et al. “Multi-Disciplinary Investigations to Determine Automobile Accident Causation: Findings.” Calspan Corp. Report CAL No. VJ-2224-V-4 March 1970
- “Summary of 1968-1970 Multidisciplinary Accident Investigation Reports: Volume 1 of 2.” National Highway Traffic Safety Administration, DOT HS-600 596 June 1971
- “Tri-Level Study of the Causes of Traffic Accidents. Vol. I: Research Findings.” DOT HS-801 334 January 1975
- “Collision Performance and Injury Report (CPIR).” University of Michigan, Highway Safety Research Institute March 1975
- “Traffic Accident Surveillance and Analysis System (TASAS).”
- McKibben J. Gray C. Niemiec K. “State-of-the-Art Definition of Vehicle Handling. Vol. I: Performance Summaries and Recommendations. Vol. II: Appendices.” Digitek Corp. DARD-1 April 1970
- Ervin R. D. Grote P. Fancher P. S. MacAdam C. C. Segel L. “Vehicle Handling Performance. Vol. I: Research Study.” University of Michigan, Highway Safety Research Institute November 1972
- Hayes G. G. Koppa R. J. White J. T. “Determination of Motor Vehicle Characteristics Affecting Driver Handling Performance. Vol. I: Technical Report.” National Highway Traffic Safety Administration, DOT HS-801 421 March 1975
- Klein R. H. Johnson W. A. Szostak H. T. “Influence of Roadway Disturbances on Vehicle Handling. Vol. II: Technical Report.” National Highway Traffic Safety Administration, DOT HS-802 211 October 1976
- Nordlin E. F. Parks D. M. Stoughton R. L. Stoker J. R. “The Effect of Longitudinal Edge of Paved Surface Drop-Off on Vehicle Stability.” California Department of Transportation, CA-DOT-TL-6783-1-76-22 March 1976
- McRuer D. T. Klein R. H. “Effects of Automobile Steering Characteristics on Driver/Vehicle Performance for Regulation Tasks,” Paper 760778 SAE Automobile Engineering Meeting Detroit October 1976
- DeLeys N. J. Segal D. J. “Vehicle Redirection Effectiveness of Median Berms and Curbs.” Calspan Corp. Report HF-5095-V-2 May 1973
- Szostak H. T. Dudley J. Brian “Evaluation of Human Factors and Highway Construction Involved in the Ducey/Glass Automobile Accident - Highway 17.” Fremont, Calif. Bennett, Canning and Spencer April 14 1975
- Bennett E. III “Investigation for Cause of the Hale Datsun Accident.” Corning, Calif. Edward Bennett and Associates August 25 1975