and descends into the Baltimore Harbor Tunnel. Northern approach I-895 surfaces from the tunnel adjacent to the toll plaza for the Fort McHenry Tunnel within the Canton neighborhood. The highway passes over several rail lines of the Canton Railroad and several streets as it curves to the north. The exit 10 ramp to Holabird Avenue diverges from I-895 immediately before the highway passes under I-95 with no access. I-895 returns to ground level and the highway crosses Ponca and Boston streets; the speed limit increases to ahead of exits 11A and 11B, which serve Boston and O'Donnell streets, respectively (with ramps to/from eastbound Boston Street and loop ramps to/from westbound O'Donnell Street). The highway crosses a rail line before passing through the Greektown neighborhood in a cut. I-895 passes under MD 150 (Eastern Avenue) ahead of exit 12, a four-ramp partial cloverleaf interchange with Lombard Street just to the west of Johns Hopkins Bayview Medical Center that has ramps in both directions of the Interstate, and is the only interchange to be built out that way. The highway veers northeast and crosses both Amtrak's Northeast Corridor and CSX Transportation's Philadelphia Subdivision railroad lines before exit 13 with US 40 (Pulaski Highway) and MD 151 (Erdman Avenue); the entrance ramp extends from the US 40–MD 151 partial cloverleaf interchange immediately to the north and west. After crossing Herring Run, I-895 meets Moravia Road at exit 14, a five-ramp partial cloverleaf interchange that lacks an exit from northbound I-895, which is accessed via exit 13 and a loop ramp to the northwest. This interchange complements exit 60 off I-95, where the eastern terminus of Moravia Road meets the planned western terminus of the Windlass Freeway. A branch of the I-95 Express Toll Lanes begin within the interchange with Moravia Road, there is a ramp from northbound I-895 to the northbound toll lanes. The highway crosses Moores Run before reaching its northern terminus at exit 62 of I-95 (John F. Kennedy Memorial Highway), a pair of flyover ramps from I-895 to northbound I-95 and from southbound I-95 to I-895 on the boundary between the city of Baltimore and the Baltimore County community of Rosedale. History Planning and construction In 1938, the SRC commissioned an engineering study, Maryland's Primary Bridge Program, to examine feasibility of major bridges across significant transportation barriers, including a bridge crossing the Patapsco River southeast of the Inner Harbor. Another