However, the 1957 numbering was drawn on a map from 1947, which did not include several changes that had been approved, specifically the Keystone Shortway across Pennsylvania. (The route in that corridor ran further north, along US 6, and was numbered I-84.) Thus, the final numbering, approved in 1958, assigned I-80 to the Norwalk-Youngstown route to reach the Keystone Shortway. The former alignment through Cleveland became I-80N; the turnpike was still not assigned a number from near Elyria (where I-80N and I-90 would split from it) to west of Youngstown. The route from west of Youngstown to Philadelphia was assigned Interstate 80S, and extended east to I-295 in New Jersey when the three-digit Interstates were assigned in 1959. (The planned I-80N in Pennsylvania became I-78.) Initial spurs of I-80S were I-180 (now I-176), I-280 (now I-276), I-480 (now I-476) and I-680 (now I-676, though it swapped with I-76 in 1972).