It was formed in 2021 from the merger of the Modesto Area Express (MAX) and Stanislaus Regional Transit (StaRT) systems.

Most routes connect at the downtown Modesto Transportation Center; the Vintage Faire Mall serves as a secondary hub.

CTC ran a single bus on a 30-minute schedule, but soon added two more buses to expand service throughout Modesto.

At the time, MBS was owned and operated by Willis M. Kleinenbroich, who was responsible for maintaining, driving, and dispatching the buses.

[6]: 120  By 1973, with the service continuing to lose money, Kleinenbroich attempted to sell the company but found no private buyers; instead, it was acquired by the city of Modesto in 1973 and renamed to Intracity Transit.