NYC also ran a free bus pilot program recently:
https://www.mta.info/guides/riding-the-bus/fare-free-bus-pil...
> From September 24, 2023 to August 31, 2024, five MTA bus routes — Bx18A/B, B60, M116, Q4, and S46/96 — were fare-free. Passengers on these routes were able to ride without paying the fare.
> The purpose of the pilot was to study how fare-free service affects ridership, access, equity, and fare evasion. It was made possible thanks to funding from the New York State FY2024 budge