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>> Contrary to some motivated readings of the literature on the subject, these trips are not going to simply vanish or convert to transit <<

This is a lot of hand waving. Mode shift & traffic evaporation are real phenomena. You argue that people won’t switch to transit, but that is not supported by any data I can find for this project. Most IDOT survey respondents say they would ride the bus instead of a car on DLSD if it had better service, reliability, and didn’t get stuck in traffic.

https://is.gd/38QZfm

Also, traffic evaporation is a real phenomenon. If we made a boulevard on the lake, car volume would go down and it’s not guaranteed the parallel streets would get 1:1 spillover. People would adjust their mode. Here’s the literature

https://www.sciencedirect.com/science/article/pii/S2213624X22002085

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