士嘉堡輕鐵
Line 3 Scarborough (originally known as the Scarborough RT or SRT) is a light rapid transit line that is part of the Toronto subway system in Toronto, Ontario, Canada. The line runs entirely within the suburban district of Scarborough, encompassing six stations and of mostly elevated track. It connects with Line 2 Bloor–Danforth at its southwestern terminus, , and terminates in the northeast at .