FSUTMS Comprehensive Modeling Workshop - Cambridge ...

Calculate Growth Factor for New Validation Year
Growth Factor = Current Count/Old Count Volume at Station
Given Current Count = 13,300 and Old Count = 12,200
Growth Factor = 13300/12200 = 1.09
Cordon
Line
EE Trips
=10,000 x
1.09
EI/IE
Trips
=2200 x
1.09
External
Station or
External
Zone
FSUTMS--CUBE MODELING TRAINING SERIES
73
Development of Future External Trips
► Factors will be developed for each station.
► Growth trends & projections
Historical Counts
Study area factor, adjoining county factor, station factor
(population, employment, tag registration, etc)
Base year IE/EE splits
For For Example - Interstate stations may contribute a small
number of vehicles to the study area; however, up to
90% or more may be EE trips. Compare this to a
collector that may consist of 90-100% in the IE/EI
volume.
FSUTMS--CUBE MODELING TRAINING SERIES
74
4-37