The issues of clearance interval time allocation, both yellow and red, has received as much or more study than has any other operational issue within the realm of traffic engineering. Many variables can and do impact the time needed for a motorist to react comfortably, legally, and willingly to clearance interval indications. This paper looks at the issue from the motorist perspective. The engineering or practitioner approach to optimizing clearance interval timing leaves the motorist with a variety of expectancies or assumptions. By eliminating driver expectancy regarding the amount of time allocated for a yellow clearance interval, one very large variable is removed. By timing all clearance intervals--yellow and red--the same, inconsistency would be eliminated, which is a step in the right direction.


  • English

Media Info

  • Pagination: 3p

Subject/Index Terms

Filing Info

  • Accession Number: 00770177
  • Record Type: Publication
  • Report/Paper Numbers: Publication No. CD-006
  • Files: TRIS
  • Created Date: Oct 14 1999 12:00AM