FSUTMS Comprehensive Modeling Workshop - Cambridge ...

FSUTMS Standards
► Model Parameters
Retain current FSUTMS
parameters and coefficients
for now.
Parameters are not software-
specific.
Mode choice parameters,
constants, and coefficients
can be edited in the Scenario
Manager when running the
model (see screenshot to the
right), and in the constant
and coefficient input files
(MC_coefficients.csv
and
MC_constants.csv) ) for transit
mode choice.
FSUTMS--CUBE MODELING TRAINING SERIES
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FSUTMS Standards
► What are constants and coefficients?
The constant for an alternative captures the average
effect on utility of all factors that are not included in the
model. The utility function represents how much value is
associated with choosing a mode alternative.
Coefficients represent the contribution of an independent
variable, such as workers or vehicle availability, towards
the utility function.
► Where do the constants and coefficients come from?
Constants and coefficients can be developed from survey
and census data but are frequently borrowed from other
comparable models. Constants are sometimes adjusted
during validation.
FSUTMS--CUBE MODELING TRAINING SERIES
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