I actually doubt it's very regressive in NYC. Also, you're still only counting the price and not the cost. The benefits are likely tilted towards the poorest residents who absorb the most costs of congestion in terms of both pollution and road safety. That's just an educated guess but it's very plausible.
A charge on the marginal driver looks regressive if you only examine who pays the toll, but not who’s been paying the externalities all along. Once you include the benefits - faster buses, cleaner air, better reliability, and the ability to reinvest revenue into transit - the incidence flips pretty quickly.
We’re basically shifting costs from people who can’t opt out of congestion to people who can. That’s about as progressive as a transport policy gets.