Be suspicious of Travel Demand Models

When it comes to transit forecasting, you should always be suspicious of anything coming out of a travel demand model. The Traffic Analysis Zones (TAZ) are often too large, and the travel times on the centroid connectors often reflect car access from parking lot, rather than walk-access from the curb, which, given the exponential decay in walking trips due to distances, leads them to over-estimate ridership for malls and strip-commercial.