ADOT state-specific crash prediction models : an Arizona needs study.

Details

• Creators:
  Colety, Michael ; Crowther, Brent ; Farmen, Matt ; Bahar, Geni Brafman ; Srinivasan, Raghavan
• Corporate Creators:
  Kimley-Horn and Associates ; NAVIGATS, Inc.
• Corporate Contributors:
  Arizona. Department of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Traffic crashes
  • Highway safety
  • Traffic safety
  • Highway factors in crashes
  • Crash causes
  • transportation safety
  • traffic safety
  • highway
  • safety
  • traffic crashes
  More +
• Publication/ Report Number:
  FHWA-AZ-16-704
• Resource Type:
  Tech Report
• Geographical Coverage:
  Arizona
• Corporate Publisher:
  Arizona. Department of Transportation
• Abstract:
  The predictive method in the Highway Safety Manual (HSM) includes a safety performance function (SPF), ; crash modification factors (CMFs), and a local calibration factor (C), if available. Two alternatives exist for ; applying the HSM prediction methodology to local conditions. They are either calibration of the SPFs found in ; the HSM or the development of jurisdiction-specific SPFs ; The objective of this study was to develop a process to evaluate the SPFs contained in the HSM for road ; segments and intersections on the Arizona State Highway System and to determine if those SPFs should be ; calibrated or if Arizona-specific SPFs should be developed. ; The recommendations are that ADOT move forward with SPF calibration for all HSM safety performance ; functions as for project-level safety analysis in Arizona. A specific calibration function has been calculated for ; two-lane rural undivided highways. Safety analysis is progressing at a promising rate and can be used to attain ; significant reductions in fatal crashes and crash severity. To achieve this, ADOT will need to make a significant ; commitment to developing and maintaining a comprehensive database of roadway characteristics combined ; with crash data and average annual daily traffic volume data that are all linked through a common linear ; referencing system.
  More +
• Format:
  PDF
• Funding:
  SPR 000-1(181) 704
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32005/dot_32005_DS1.pdf
• File Type:
  [PDF - 4.89 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:b4add369adcd171335df3366536ce365fee48fbeb5d2045ac39e63fe9f511bd3