The most recent study, conducted in 2003, envisions the service as a branch of the Broad Street Line that would draw over 124,000 daily riders and thereby divert over 83,000 car trips.[5] Ashwin Patel, a senior manager at PennDOT, said at the meeting that the agency would study what is feasible — whether it be a subway, an elevated rail line or more dedicated bus routes.[3] In the 2003 study's preferred alignment, the Roosevelt Boulevard Subway would split east from the Broad Street Line underground at Erie station, using an already extant flying junction with the express tracks.It would then tunnel to Roosevelt Boulevard and be constructed cut and cover until Blue Grass Road near the northern edge of Philadelphia.Additionally, a cut and cover extension of the Market–Frankford Line would be constructed under Bustleton Avenue, north from Frankford Transportation Center, to interchange with the Roosevelt Boulevard Subway.