The story
Starting in 1979, the Hartford, New Haven, and Stamford divisions of CT Transit were operated by First Transit.
Prior to 2002, CT Transit Stamford routes were identified by letters rather than numbers, just like the systems in Hartford and New Haven. Some bus stop signs outside of downtown Stamford and Greenwich still display the route letters. On Sunday, August 14, 2016, buses serving the Stamford area, with the exception of the I-Bus, were numbered 301 through 399.
On December 27, 2022, the Connecticut Department of Transportation announced it would switch its operator if its Hartford, New Haven, and Stamford divisions of CT Transit from First Transit to RATP Dev USA, a division of France's state-owned RATP Group. The contract became effective at the start of 2023, and lasts for four years, and includes a clause that the Connecticut Department of Transportation can extend the contract for two more years twice.
From Wikipedia’s article on CT Transit Stamford, shared under CC BY-SA 4.0.3
