A PREVIEW PREDICTOR MODEL OF DRIVER BEHAVIOR IN EMERGENCY SITUATIONS

A CLOSED-LOOP NONLINEAR DRIVER CONTOL MATHEMATICAL MODEL WAS DEVELOPED TO ENALBE A BETTER DEFINITION OF EMERGENCY AND PREIMPACT CONDITIONS, PARTICULARLY OF SINGLE VEHICLE ACCIDENTS. A MODEL OF THE DRIVER WAS COMBINED WITH AN EXISTING VEHICLE MODEL TO PERMIT COMPARISONS OF SIMULATED RESPONSES WITH EXPERIMENTS INVOLVING MANEUVERS AT OR NEAR THE UPPER LIMITS OF VEHICLE AND DRIVER CONTROL. SPECIFIC INPUT PARAMETER VALUES AND RANGES HAVE YET TO BE DETERMINED, HOWEVER, APPROXIMATE VALUES HAVE BEEN OBTAINED BY QUALITATIVE ANALYSIS. PRELIMINARY TESTS WERE MADE TO DETERMINE IF THE MODEL BEHAVED IN A "REASONABLE" MANNER RESULTS WERE: (1) IN THE EMERGENCY LANE CHANGE MODE INCREASING THE NUMBER OF SAMPLE POINTS ALONG THE PROJECTED PATH UP TO A MAXIMUM OF SEVEN CAUSED SMOOTHING OF MODEL OUTPUT AND VARYING THE CONTROL GAIN DEMONSTRATED ALL REGIONS OF STABILITY. (2) IN THE SPEED CHANGE AND SPEED MAINTENANCE MODES, THERE WERE DISCREPANCIES BETWEEN DESIRED DISTANCES AND ACTUAL DISTANCES FOR BOTH ACCELERATIONS AND DECELERA- TIONS. (3) INCREASES IN VEHICLE SLIP ANGLE AND YAW VELOCITY DURING BRAKING IN A TURNING MANEUVER WERE NOT SUFFICIENT TO INDUCE SKIDDING; THEREFORE THE DRIVER MODEL WAS NOT EXERCISED FOR THE SKID RECOVERY MODE. /AUTHOR/

• Supplemental Notes:
  • Cpr-11-3988, 3512-022
• Corporate Authors:

  Cornell Aeronautical Laboratory, Incorporated

  4455 Genesee Street
  Buffalo, NY  United States  14221

  New York State Department of Transportation

  1220 Washington Avenue
  Albany, NY  United States  12232

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Roland, R D
  • Kroll, C V
• Publication Date: 1970-10

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Behavior; Control; Deceleration; Distance; Drivers; Emergencies; Forecasting; Mathematical models; Qualitative analysis; Simulation; Single vehicle crashes; Slip surfaces; Speed change lanes; Traffic lanes; Vehicles; Velocity; Yaw
• Uncontrolled Terms: Slip angle
• Old TRIS Terms: Driver control; Lanes
• Subject Areas: Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00219746
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Files: TRIS, USDOT, STATEDOT
• Created Date: Mar 7 1971 12:00AM