the remainder of I-80S to I-295. I-80S would remain on the section of turnpikes from west of Youngstown to Monroeville. This was approved February 26, 1964, and included the renumbering of all I-X80 spurs to I-X76. On June 29, 1970, a renumbering was approved in the Pittsburgh area, with the main effect being rerouting I-79 to bypass Pittsburgh to the west on the former I-279. I-279 was moved to the former I-79 north of downtown, and the former I-79 from downtown southwest to new I-79 became a western extension of I-76. (It was then that I-876 was designated for former I-479.) A realignment and extension of I-76 into Ohio, taking over the rest of I-80S to I-71 east of Lodi, was approved January 11, 1972. The former I-76 from Monroeville west into Downtown Pittsburgh became I-376, and I-279 was extended southwest from downtown along former I-76 to I-79. (I-876 was renumbered to I-579 then.) Signs in Ohio were changed September 1, 1972; the old I-80S signs remained for about a year. On August 29, 1972, a swap of I-76 and I-676 in Philadelphia and Camden was approved. I-76 had been routed along the Vine Street Expressway and Ben Franklin Bridge (now I-676) through Center City, while I-676 used the Schuylkill Expressway and Walt Whitman Bridge to bypass downtown to the south. The switch was made because of delays in building the Vine Street Expressway, better interchange geometry at the splits, and that the Ben Franklin Bridge ends in city streets, rather than in expressway grade. The renumbering of a Philadelphia Interstate to I-76 in the years leading up to the Bicentennial Celebration of the 1776 signing in Philadelphia of the Declaration of Independence gives rise to the question of the highway number being an intentional tribute to the Spirit of 1776. US Department of Transportation (USDOT) research into federal documentation of the I-76 renumbering found no evidence of this being intentional. Exit list In Ohio and Pennsylvania, the routes are composed mostly of turnpikes with the exceptions in east-central Ohio and the Delaware Valley. The exit numbers on the turnpike portions in Ohio follow the mileage markers for the Ohio Turnpike. Ohio Pennsylvania New Jersey Auxiliary routes I-176 runs north from I-76 at Morgantown, Pennsylvania, to US 422 outside of Reading, Pennsylvania. I-276 runs east from I-76 at Valley Forge, Pennsylvania, along the Pennsylvania Turnpike to I-95 in Bristol Township,