Evaluation of traffic signal performance and signal failure impact

Intelligent transport systems (ITS) assets are being installed throughout the road network to manage and control the road traffic. There is a need to evaluate performance of the safety-critical ITS assets and quantify the possible impact on the community of asset faults, and then jurisdictions would be able to prioritise and initiate action to reduce the occurrence of these faults. In Australia and New Zealand, majority of the signalised intersections are operated by the Sydney Coordinated Adaptive Traffic System (SCATS). This paper reviews the current practice and describes a consistent methodology for measuring SCATS signal performance from a road user perspective. Signal availability was used as the key performance indicator (KPI) for the performance measurement. The SCATS signal availability based on four major alarms in calendar year 2013 from seven state road agencies (SRAs) in Australia and New Zealand was evaluated and reported. The congestion and safety impact on community during signal failure for the seven reported jurisdictions was estimated to be AU$268 m in 2013. The signal availability benchmarks, including the lowest performance threshold and optimal performance levels were also identified for the reference of road agencies.

• Record URL:
  http://arrbknowledge.com
• Authors:
  • Han, C
  • Karl, C
  • Dang, K
  • Drepas, A
  • Galli, A
• Conference:
  • ARRB Conference, 27th, 2016, Melbourne, Victoria, Australia
• Publication Date: 2016-11

Language

• English

Media Info

• Pagination: 12p
• Monograph Title: Linking people, places and opportunities: 27th ARRB Conference, 16-18 November 2016, Melbourne, Victoria

Subject/Index Terms

• TRT Terms: Evaluation; Failure; Highway traffic control; Level of service; Traffic congestion; Traffic control; Traffic signal control systems; Traffic signals; Transportation departments
• Geographic Terms: Australia; New Zealand
• ATRI Terms: Area traffic control; Evaluation; Failure; Level of service; Road authority; Traffic congestion; Traffic management
• ITRD Terms: 632: Congestion (traffic); 8735: Intelligent transport system; 253: Transport authority
• Subject Areas: Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01622873
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Jan 24 2017 12:00PM