The elevation of the P.R.R. through Bristol was done between 1910-1911. This is an underpass being constructed at Bath Street. The trolley tracks in the street connected Bristol with Newtown and Doylestown (circa 1900-1932).
Otter Street underpass at U.S. Route 13 of the P.R.R. when it was being elevated, circa 1910-1911. Note the trolley track on the left at street level, which connected Bristol to Philadelphia from (1900-1932).