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FSUTMS Comprehensive Modeling Workshop - Cambridge ...

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Subarea Balancing<br />

►Alternative to K-FactorsK<br />

►Subareas (e.g., counties, planning districts) are<br />

identified for balancing of productions and<br />

attractions<br />

►Successfully employed in NERPM and TBRPM<br />

►Proceed with caution; not as much history as K-K<br />

factor approach<br />

<strong>FSUTMS</strong>--CUBE MODELING TRAINING SERIES<br />

11<br />

Congested Skims<br />

► Not included in highway-only models<br />

► Required for nested logit mode choice models<br />

► Congested skims are simulated by running pre-mode<br />

choice and pre-highway assignment prior to transit<br />

network building process<br />

► Some models use congested skims as input to<br />

distribution for home-based work trips<br />

► Some models go one step further and compute<br />

composite skims that include weighted highway and<br />

transit travel times as input to the final trip distribution<br />

<strong>FSUTMS</strong>--CUBE MODELING TRAINING SERIES<br />

12<br />

6-6

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