Toronto Transit is the public transit system in Toronto, Ontario, Canada. It includes a network of buses, streetcars, and subways. The term 'Toronto Transit' is often used to refer to the SUBWAY system, which is the most popular form of public transportation in the city. The SUBWAY system consists of six lines, which are identified by their colors: the Yonge-University line (blue), the Bloor-Danforth line (green), the Scarborough line (purple), the Sheppard line (yellow), the Finch West line (orange), and the Eglinton Crosstown line (light blue). The answer to the crossword clue is 'SUBWAY'.