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Some Factors Limiting Driver-Vehicle Performance
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English
Abstract
The measurement of drivers' performance at the limit of capability is difficult due to methodological problems, moment to moment variability of drivers, differences between drivers, and their interactions with the characteristics of the vehicle, road, and environment.
Aspects of longitudinal and lateral vehicle control are discussed by reference to results of braking and steering tests, with emphasis on the variations between the performance of drivers.
The effectiveness of drivers in vehicle braking is shown to be a function of the brake system deceleration/pedal force gain. Overall braking performance could also be improved by increasing the abilities of drivers who are poor in this task, by training in brake modulation on dry and wet pavements. The best drivers are as effective as an antilocking brake system, except on the equivalent of ice covered pavement. In steering control drivers increase their response frequency bandwidth as task difficulty increases. Comparisons are shown between an inexperienced and an experienced driver in curve negotiation up to the limit of control.
BOTH PEOPLE AND MACHINES have limits. In the case of machines the limits can be predetermined, by and large, before they are built. By comparison, humans come preassembled, packaged, and largely at random. A person can be trained to use a device, but the basic performance limits imposed by his physiology and psychology remain unchanged.
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Authors
Citation
Mortimer, R. and Olson, P., "Some Factors Limiting Driver-Vehicle Performance," SAE Technical Paper 730017, 1973, https://doi.org/10.4271/730017.Also In
References
- Stoudt H. W. Crowley T. J. Gruber B. McFarland R. A. “Vehicle Handling: Force Capabilities for Braking and Steering.” NHTSA, U.S. Department of Transportation Harvard School of Public Health 1969
- Raklinski R. W. Price J. I. “The Brake Pedal Force Capabilities of Adult Females.” National Bureau of Standards 1970
- Mortimer R. G. Segel L. Dugoff H. Campbell J. D. Jorgeson C. M. Murphy R. W. “Brake Force Requirements Study: Driver-Vehicle Braking Performance as a Function of Brake System Design Variables.” NHTSA, U.S. Department of Transportation Highway Safety Research Institute, University of Michigan 1970
- “Accident Facts, 1971 Edition.” Chicago National Safety Council 1971
- Michaels R. M. “Perceptual Factors in Car Following.” Proceedings of the Second International Symposium on the Theory of Traffic Flow London 1963 Organization for Economic Cooperation and Development Paris 1965 44 59
- Hoffman E. R. “Detection of Velocity Changes in Car Following.” Fourth Conference Australian Road Research Board 1968
- Carpenter N. “Some Measurements of Brake Usage in a High-Speed Saloon Car.” Ferodo Ltd. Stockport, England October 1955
- Kummer H. W. Meyer W. E. “Tentative Skid-Resistance Requirements for Main Rural Highways.” National Cooperative Highway Research Program Highway Research Board 1967
- Mortimer R. G. “Hard Braking Is More Common Than You Might Think.” Automotive Engineering 79 August 1971
- Segel L. Mortimer R. “Driver Braking Performance as a Function of Pedal-Force and Pedal-Displacement Levels.” SAE Transactions 79 1970 paper 700364
- Murphy R. W. DiLorenzo F. A. “A Procedure for Evaluating Braking Performance.” High-way Safety Research Institute, University of Michigan June 1972
- Forbes L. M. “A Human Factors Evaluation of Steering Gear Ratios for the 196X Ford.” Ford Motor Co. 1962
- Shoemaker N. Dell'Amico F. “A Pilot Experiment on Driver Task Performance with Fixed and Variable Steering Ratio.” 1966
- Olson P. L. Thompson R. R. “The Effect of Variable-Ratio Steering Gears on Driver Preference and Performance.” Human Factors 12 December 1970 553 558
- Bundorf R. T. “The Use of a Variable Stability Vehicle in Handling Research.” General Motors Corp. 1965
- Hoffmann E. R. Joubert P. N. “The Effect of Changes in Some Vehicle Handling Variables on Driver Steering Performance.” Human Factors 8 June 1966 245 263
- Segel L. “An Investigation of Automobile Handling as Implemented by a Variable Steering Automobile.” Human Factors 6 August 1964 333 341
- Hoffmann E. R. Joubert P. N. “Just Noticeable Differences in Some Vehicle Handling Variables.” Department of Mechanical Engineering, Univ. of Melbourne 1967
- Weir D. H. McRuer D. T. “A Theory for Driver Steering Control of Motor Vehicles.” Highway Research Board 1968
- Ritchie M. L. McCoy W. K. Welde W. L. “A Study of the Relation Between Forward Velocity and Lateral Acceleration in Curves During Normal Driving.” Human Factors 10 June 1968 255 258
- Neuhardt J. B. Herrin G. D. Rockwell T. H. “Demonstration of a Test-Driver Technique to Assess the Effects of Roadway Geometries and Development of Speed Selection.” College of Engineering, Ohio State Univ. 1971
- Mortimer R. G. Highway Safety Research Institute, Univ. of Michigan
- Hales F. D. Jurkat M. P. “Driver Behavior in Controlling a Driving Simulator with Varying Stability.” Proceedings of the Institution of Mechanical Engineers London 183 1969