THE LANE DROP STUDY (RELATING ROADWAY ELEMENTS TO ACCIDENTS)

THE RELATIVE SAFETY IS IDENTIFIED AND EVALUATED OF THE VARIOUS TYPES OF LANE DROP SITUATIONS PRESENTLY FOUND ON CALIFORNIA HIGHWAYS. EIGHT DIFFERENT LANE DROP SITUATIONS WERE CATEGORIZED AND 167 DIFFERENT SITES FITTING THESE DESCRIPTIONS WERE LOCATED. USING THE 1965 AND 1966 ACCIDENT RECORDS, ACCIDENT RATES WERE CALCULATED FOR THE UPSTREAM, TRANSITION, AND DOWNSTREAM PORTIONS OF ROAD AT EACH LANE DROP. THESE RATES WERE COMPARED FOR SIGNIFICANT DIFFERENCES USING THE CHI-SQUARE TESTS. COMPARISONS RELATIVE TO MAINLINE ALIGNMENT, RAMP LOCATION, AND PAVEMENT TYPE IN THE LANE DROP AREA ARE ALSO INCLUDED IN THE STUDY. /SRIS/

• Supplemental Notes:
  • 41 Pp, 4 FiG, 5 TAB
• Corporate Authors:

  California Division of Highways

  Bridge Department
  Sacramento, CA  United States  05914
• Authors:
  • Tye, E J
  • Lowden, P R
• Publication Date: 1968-6

Subject/Index Terms

• TRT Terms: Alignment; Chi square test; Crash rates; Highway safety; Interchange ramps; Location; Merging traffic; Pavements; Spacing; Traffic lanes
• Uncontrolled Terms: Transition zones
• Old TRIS Terms: Ramp location & spacing
• Subject Areas: Highways; Operations and Traffic Management; Pavements;

Filing Info

• Accession Number: 00225712
• Record Type: Publication
• Source Agency: Nat Safety Council Safety Res Info Serv
• Files: TRIS
• Created Date: May 25 1970 12:00AM