SIMULATION OF CROSS-MEDIAN CRASHES

THE RESULTS OF A SIMULATION STUDY OF VEHICLES CROSSING THE MEDIAN OF A 6-LANE EXPRESSWAY AT ANGLES OF 10 AND 50 DEG. ARE REPORTED. THE COMPUTER SIMULATION MODEL ALLOWED AUTOMOBILES TO BE RANDOMLY RELEASED TO CROSS THE MEDIAN AT A CONSTANT SPEED AND TO ENCROACH INTO OPPOSING LANES. NO PROVISION WAS MADE FOR THE DRIVER TO BRAKE OR REGAIN CONTROL OF THE VEHICLE. OPPOSING VEHICLES WERE GENERATED BY THE NEGATIVE EXPONENTIAL DISTRIBUTION. THE EFFECTS OF THE FOLLOWING VARIABLES ON PROBABILITY OF CRASH AND AVERAGE IMPACT SPEED WERE STUDIED: CROSSING ANGLE, LANE VOLUME, SPEED OF OPPOSING VEHICLES, SPEED OF CROSSING VEHICLES; MEDIAN WIDTH, PERCEPTION-REACTION TIME, AND SKID RESISTANCE. IT WAS FOUND THAT BOTH PROBABILITY OF CRASH AND AVERAGE IMPACT SPEED ARE MOST STRONGLY RELATED TO CROSSING ANGLE, MEDIAN WIDTH, AND SPEED OF THE CROSSING VEHICLE. CRASH PROBABILITY AND IMPACT SPEED ARE MORE FUNDAMENTALLY DEPENDENT ON THE TIME REQUIRED FOR THE VEHICLE TO CROSS THE MEDIAN. AN EVALUATION OF THE SIMULATION MODEL AND A DISCUSSION OF THE APPLICABILITY OF THE RESULTS TO REAL TRAFFIC CONDITIONS ARE GIVEN. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 13-21
  • Monograph Title: Freeway operations and control
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00221781
  • Record Type: Publication
  • Report/Paper Numbers: No 390 PP 36-9
  • Files: TRIS, TRB
  • Created Date: Sep 19 1972 12:00AM