Showing posts with label centroid. Show all posts
Showing posts with label centroid. Show all posts

Wednesday, March 4, 2026

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.