1942. By 1940, MDSRC recommended the Defense Highway be completed rebuilt, preferably on a new location. The roads commission suggested widening of the Severn River Bridge by 1942. However, by 1944, a new bridge was proposed upstream of the existing bridge because the U.S. Navy desired a relocation. US 50 was extended east along modern MD 450 through Annapolis and across the Severn River to what had been MD 404 as part of its extension to Ocean City in 1949. Replacement and recent improvements Construction on the Annapolis–Washington Expressway (now John Hanson Highway) began in 1949 between US 301 in Bowie and what is now MD 450 in Parole. The new freeway opened to traffic in 1952. Construction on the new bridge over the Severn River began in 1950 and was completed in 1952, the same year work began on the Annapolis Bypass between Parole and Arnold. The Annapolis Bypass opened from MD 450 in Parole to the three-level Ritchie–Revell interchange between US 50, MD 2, and MD 450 in June 1954. That same year, US 50 was moved to the new freeway from Bowie to Arnold and MD 450 was assigned to the old highway from US 301 (now MD 3) in Crofton to its present eastern terminus in Arnold. MD 450 was expanded to a divided highway from west of MD 2 to east of MD 393 in 1956. In addition, the portion of MD 450 that is concurrent with MD 3 was expanded to a divided highway, including a new bridge across the Patuxent River, between 1956 and 1958. The only major changes to MD 450 in Anne Arundel County since the 1950s have been bridge replacements. The highway's bridge across College Creek was replaced in 1987. The Severn River Bridge was replaced with the Naval Academy Bridge in 1995. In Prince George's County, the extension of John Hanson Highway west toward Washington began in 1953. The freeway was completed west to MD 704 in 1957. US 50 remained signed along Defense Highway in Prince George's County; instead, the new freeway and MD 704 southwest into Washington were designated Temporary US 50 by 1958. US 50 was assigned to John Hanson Highway west of US 301 when the freeway was completed into Washington in 1962. That same year, MD 450 was extended west along US 50's old route to its present western terminus at US 1 Alternate