Im not sure this fits, they saw a much larger drop (18%) in heavy duty trucks entering the city, and a smaller drop (9%) in passenger cars. I am not sure the public transit options are close alternatives for heavy duty trucks.
If you need to reach Long Island, the incentive to avoid the (tolled) Throgs Neck, Whitestone, Verrazzano, and RFK bridges are gone; now you're paying for the privilege of sitting in Manhattan traffic.
[0]: https://congestionreliefzone.mta.info/faqs
[1]: https://www.cbsnews.com/newyork/news/nyc-congestion-pricing-...
[2]: https://www.nyc.gov/html/dot/html/motorist/parkway-restricti...