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Guidelines on the Use of Auxiliary Through Lanes at Signalized Intersections (2011) / Chapter Skim
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Appendix B - Computational Engine
Pages 75-77

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From page 75...
... A similar set of design options is provided in the same spreadsheet for a two - CTL configuration. The Input Dialog Box The input dialog box for a one - CTL case is depicted in Exhibit B - 2 .
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From page 76...
... . Additional input information consists of prevailing approach speed, average vehicle spacing at stop bar, acceleration rate from stop bar, intersection width, critical gap for merging from ATL into CTL, driver reacti on time, and a confidence level for calculating the downstream ATL length.
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From page 77...
... . The computational engine also summarizes average control delay, LOS , ATL utilization, and the estimated minimum length for the upstream and downstream ATL at the approach level based on the procedures described in the g uidelines.
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Key Terms

  • stop bar
  • default value
  • downstream atl
  • input dialog
  • geometric configuration

  • procedures described
  • dialog box
  • saturation flow
  • average control
  • average vehicle

  • approach speed
  • signal timing
  • prevailing approach
  • acceleration rate
  • approach results

  • intersection width
  • atl utilization
  • vehicle spacing
  • driver reaction
  • critical gap

  • flow rate
  • control delay
  • percentile queue
  • reaction time
  • shared ctl

  • estimated minimum
  • ctl approaches
  • single lane
  • effective green
  • flow rates


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