South of Queen Street West and the Queensway, the route turns east along King Street. At Dufferin Street, 504B streetcars from Dufferin Gate Loop merge with 504A streetcars to provide a combined service along King Street to Sumach Street. Continuing further east to Bathurst Street, and after crossing the 511 Bathurst route, the 504 enters a transit mall where automobiles have restrictions so as not to impede streetcar service. Continuing eastward past Spadina Avenue, crossing route 510 Spadina, the 504 route passes St. Andrew station at University Avenue and King station at Yonge Street, both on Line 1 Yonge–University. At York Street, rush-hour route 503 Kingston Rd merges eastwards with route 504. At Jarvis Street, the transit mall ends and routes 503, 504A and 504B continue to Sumach Street, where route 504A turns south on Cherry Street to proceed to Distillery Loop. Routes 503 and 504B continue on King Street, as the street bends northeast to merge with Queen Street East, route 501 Queen and workday route 502 Downtowner. Routes 501, 502, 503 and 504B all cross the Queen Street Viaduct and the Don River to arrive at Broadview Avenue.