Aimsun saturation flow calibration for hybrid simulation: challenges and recommendations

Microscopic and mesoscopic traffic modelling has increased in popularity across Australia over the last decade. Recently, these two levels have been facilitated in Aimsun within a common model network; enabling a simulation referred to as hybrid. A key component of operational model calibration is saturation flow at intersections. It has been determined through research that the key factors impacting saturation flow are related to lane widths, gradients and turn radii; however the primary factors impacting the car-following model in Aimsun are related to other parameters such as vehicle reaction times. The analysis in this paper has determined that default parameters in Aimsun version 8.2.0 may lead to an overestimation of saturation flow rates in micro and meso simulation. The analysis has identified indicative parameter values that could be used as a starting point in the calibration of saturation flows; which produce comparable operation at the meso and micro levels to assist in hybrid network development.

• Record URL:
  https://www.aitpm.com.au/presentations/
• Authors:
  • Bennett, J
  • Betts, B
• Conference:
  • Australian Institute of Traffic Planning and Management (AITPM) National Conference, 2017, Melbourne, Victoria, Australia
• Publication Date: 2017-8

Language

• English

Media Info

• Pagination: 14p
• Monograph Title: AITPM National Traffic and Transport Conference, 15-18 August 2017, Melbourne

Subject/Index Terms

• TRT Terms: Calibration; Highway capacity; Highway traffic control; Mathematical models; Microsimulation; Software; Traffic congestion; Traffic flow; Types of roads by network
• Uncontrolled Terms: Road networks
• Geographic Terms: Australia
• ATRI Terms: Calibration; Microsimulation; Modelling; Road network; Traffic capacity; Traffic congestion; Traffic flow; Traffic management
• ITRD Terms: 645: Capacity (traffic network); 632: Congestion (traffic)
• Subject Areas: Highways; Operations and Traffic Management; I71: Traffic Theory;

Filing Info

• Accession Number: 01664037
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Mar 22 2018 12:31PM