Safety benefits of implementing adaptive signal control technology : survey results.

Details

• Creators:
  Lodes, Michael ; Benekohal, Rahim F.
• Corporate Creators:
  Illinois Center for Transportation ; University of Illinois at Urbana-Champaign. Dept. of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Adaptive control
  • Signalization
  • Surveys
  • Local government agencies
  • Implementation
  • Costs
  • Benefit cost analysis
  • Traffic signal control systems
  • Highway safety
• Publication/ Report Number:
  FHWA-ICT-12-020 ; ICT-12-020 ; UILU-ENG-2013-2002
• Resource Type:
  Tech Report
• Geographical Coverage:
  Illinois
• Corporate Publisher:
  Illinois. Dept. of Transportation. Bureau of Materials and Physical Research
• Abstract:
  The safety benefits and costs associated with implementing adaptive signal control technology (ASCT) were evaluated in ; this study. A user-friendly online survey was distributed to 62 agencies that had implemented ASCT in the United States. ; Twenty-two agencies responded to the survey, providing information about the system type, detection type, and cost of ; ASCT implementation. These agencies were from city governments (47%), state governments (29%), and county ; governments (24%). They represented both a wide range of ASCT implementation rates (from 1 to 700 intersections) and ; five of the most popular ASCT systems. There was a range of ASCT costs for different systems and detection types used ; with the system. The average cost per intersection to the agencies that responded was $38,223 when cost data from all ; agencies were included, but it was $28,725 when the cost data from agencies with the lowest and highest figures were ; excluded. Detailed volume and geometry data were provided by the respondents for six specific intersections. Crash data ; were provided for three of these six intersections. Each of the three intersections exhibited a crash reduction, but the ; sample size was too small for statistical testing. The observed ASCT cost per intersection per annual crash reduction was ; computed for the three intersections, and it ranged from $5,444 to $37,500. The scope of this study was very limited; thus, ; only very limited conclusions could be drawn. The limited data seem to indicate that there are safety benefits for ; implementing ASCT. It is recommended that a controlled experiment of ASCT implementation in Illinois be conducted to ; determine benefit–cost ratios and compute a crash modification factor (CMF).
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• Format:
  PDF
• Funding:
  R27-SP20
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26729/dot_26729_DS1.pdf
• File Type:
  [PDF - 1.32 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:70525eb9c8dc87deaf295847f684eb92a20dfd367150b4f34ad77a4b8c0525b5