as the 14th Street bridges. Potomac River crossings for the Washington Metro's Yellow Line and for a major CSX Transportation railroad line are immediately downstream here. This site has long been a major Potomac River crossing, with the first bridge constructed here in 1809. Of the present highway spans, the eastern one was built in 1950, the western one in 1962, and the central one in 1972. District of Columbia After crossing the 14th Street bridges, the freeway has a left-side exit allowing access to US 1 (exit 1). The southbound side of I-395 has no access to northbound US 1 here. I-395 crosses East Potomac Park (exit 2) and a second bridge, the Francis Case Memorial Bridge over the Washington Channel. Here, the route bends from a generally northeast direction to a due east direction, interchanging (exit 3) with the 9th and 12th Street Expressways, two tunnels that carry traffic under the National Mall. A series of complex interchanges (numbered 4, 5, 6, and 7) provide partial access to Maine Avenue and C Street Southwest, as well as connections to I-695. Immediately after I-695, the freeway makes a hard turn to the due north to follow the 3rd Street Tunnel immediately under Union Square, just to the west of the US Capitol building and underneath the Frances Perkins Building. I-395 follows a depressed roadway (the Center Leg Freeway), which was placed underground in 2019, that has three more partial interchanges (exits 8, 9, and 10) with local streets before terminating at New York Avenue/US 50. History Shirley Highway The portion of I-395 between the Pentagon in Arlington, Virginia, and the interchange with I-95 and the Capital Beltway in Springfield is part of the Henry G. Shirley Memorial Highway, named for the Virginia Highway Commissioner who died on July 16, 1941, just a few weeks after approving work on the new expressway. Originally SR 350, the full length of the Henry G. Shirley Memorial Highway was opened on September 6, 1949, from south of the Pentagon to Woodbridge, Virginia, along what is now better known as the I-95 corridor. The Henry G. Shirley Memorial Highway featured the nation's first reversible bus lanes, a precursor to today's HOV lanes. During an evening rush-hour snowstorm in 1982, Air Florida Flight 90 crashed on takeoff from what was then known as Washington National Airport, hitting the easternmost of the three highway bridges known