United States Department of Transportation
i
Transit Boardings Estimation and Simulation Tool (TBEST) calibration for guideway and BRT modes.
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2013-06-01
[PDF-2.28 MB]
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NTL Classification:NTL-PUBLIC TRANSPORTATION-PUBLIC TRANSPORTATION;NTL-PLANNING AND POLICY-Transit Planning and Policy;
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Abstract:This research initiative was motivated by a desire of the Florida Department of Transportation and the
Transit Boardings Estimation and Simulation Tool (TBEST) project team to enhance the value of TBEST to
the planning community by improving its capability to provide forecasts for light rail transit (LRT) and bus
rapid transit (BRT) technologies. Specific strategies for calibration were explored and developed for BRT
and LRT calibration. The BRT methodology relied on a scoring system to determine the scope of BRT
features and scaling the ridership impact accordingly, based on the best available empirical data. The BRT
adjustment factor would be a maximum of 30 percent for a very highly specified BRT with exclusive
travelway along the full length.
The LRT strategy relied on comparison of TBEST results with both sketch planning LRT forecasts and
regional model forecasts for Hillsborough County. These results suggested that the scope of system
changes and competitiveness of rail was such that large adjustments in TBEST forecasts would be
necessary to replicate LRT forecasts. In light of these results, the project team suggests recalibration with
a forthcoming Federal Transit Administration sketch planning model and, in the interim, restricting
technology adjustments to no more than 50 percent.
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