This paper describes drivers' car-following behavior on real highways. Traffic data from a freeway in the downtown Boston area were collected using a video camera. Car-following spacing was measured by the stop-frame method. Initial results show there is no simple or consistent relationship between the following distance and speed for the average driver. There is greater variation of following distance between drivers within a speed range than there is between speed ranges for an average driver, and there is little statistical difference in car-following distances under different environmental conditions. Further, it seems that a large proportion of drivers follow at distances which, by reasonable, objective criteria, make it unlikely that if the lead car stops suddenly the following car can stop in time.


  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 993-999

Subject/Index Terms

Filing Info

  • Accession Number: 00711377
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 5 1995 12:00AM