Seeing this article...
https://chicago.curbed.com/2019/10/1...ayor-lightfoot
... I had one thought.
It is absolutely the wrong approach for any city to use added fees for taxi services (in whatever form) to reduce congestion if they do not have a congestion charge for private vehicles.
Taxis and yes, Ubers/Lyfts are an absolutely essential mode of transportation for city residents, especially those without their own cars. It’s almost absurd that you impose fees on these people before you impose them on suburbanites stupid enough to drive downtown.
Every dense city with decent public transportation should have a central congestion charge. There is an alternative and people need a nudge to use it. But there are lots of reasons why quick trips in the city can and should be done by Uber (especially in Chicago where all of the heavy rail lines are hub and spoke with basically one hub).