Investigating the Effectiveness of Stop Lines in Improving Safety at Two-Way Stop Controlled Intersections

Stop lines are ubiquitous, but do they really impact intersection safety? Prior to this project, no long term studies on intersection safety with stop lines had been completed. This safety study was developed to estimate the effect, if any, stop lines have on intersection safety. Following established Highway Safety Manual (HSM) procedures, the study utilized historical crash records from all non-all-way-stop-controlled (NAWSC) intersections in five Twin Cities metropolitan areas’ stop-controlled intersections to quantify the effect and significance of stop lines on crash occurrence while controlling for other variables like annual average daily traffic (AADT), sight distance quality, speed limits, and other. The safety study showed that stop lines do not have a significant impact on driver behavior or intersection safety, but other factors like site geometry and pedestrian presence can have an impact. Implications for practice include carefully examining sight distance at the intended stopping point to ensure drivers will have adequate sight distance in both directions; considering adaptions when sight distance is not adequate, such as moving the intended stopping location or reconsidering if the intersection should be signed – stop or yield – or uncontrolled may yield better driver compliance and safety.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 15p

Subject/Index Terms

Filing Info

  • Accession Number: 01763404
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-03314
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 10:58AM