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SIDRA Field Survey Applications for Calibration of Key Model Parameters

A number of SIDRA Excel applications are available for field surveys of key input parameters and the related queue data for use in model calibration:

  • Critical Gap (Headway) and Follow-up Headway
  • Saturation Flow and related parameters Start Loss, End Gain and Equivalent SCATS MF (Maximum Flow)
  • Average and Percentile values of Back of Queue and Queue at Start of Green or Queue at Start of Gap

These survey Excel applications are available for download from the SIDRA Utilities page:

  • SIDRA GAP ACCEPTANCE SURVEY
  • SIDRA SATURATION FLOW SURVEY
  • SIDRA QUEUE SURVEY
  • About Calibration of the SIDRA capacity model using Delay Data
  • Queue Length for Model Calibration
  • A new Gap Acceptance Survey Method — CHUN, G., ROUPHAIL, N.M. and AKÇELIK, R. (2025). A Roundabout Capacity Survey Method Using Gap Acceptance Cycles and Vehicle Trajectory Data. Technical Note. Akcelik and Associates Pty Ltd, Melbourne, Australia. Available from the Publications page.
  • Use of SCATS MF to Calibrate SIDRA Saturation Flow — NASH, D., AKÇELIK, R., BESLEY, M. and ESPADA, I. (2023). Use of SCATS MF to Calibrate SIDRA Saturation Flow. Technical Note. Akcelik and Associates Pty Ltd, Melbourne, Australia. Available from the Publications page.