Route 25 provides service to the employment area surrounding Hurontario Street between Matheson Boulevard and Highway 401, providing connections to nearby MiWay and Brampton Transit routes.
August 2, 2005 - Route revised to no longer travel to and from City Centre Transit Terminal via Hurontario Street.Service frequency is 18-20 minutes with 1 bus. Renamed 25 'Traders' from 25 'Britannia Industrial'.
September 6, 2010 – Route designated as accessible, with low floor buses used at all times.
April 27, 2020 - Route revised to cover areas west of Hurontario Street, replacing route 19B service. East of Hurontario street, the loop routing is revised to no longer cover McAdam Boulevard. Service frequency is 15 minutes with 2 buses.