In 1928, several projects to relieve congestion in the Boston area were completed. One of these was the opening of the Boston University Bridge (at the time known as Cottage Farm Bridge). The opening of this new bridge over the Charles River resulted in the relocation of the triple concurrency of US 1, US 3, and Route 28 onto it. The routes left the Riverway using Park Drive and Mountfort Street (both now designated as part of Route 2) to reach the bridge. In Cambridge and Somerville, a new boulevard known as the Northern Artery was built over part of Somerville Avenue and Medford Street, continuing north on a new roadway cutting across Somerville to Fellsway East, which was also paved over by the new Northern Artery. The Northern Artery provided a high speed connection between the Charles River and the Mystic River. US 1 and Route 28 were relocated off of local streets in Cambridge and Somerville onto the Northern Artery when it opened to traffic. From the Boston University Bridge, the two routes used Memorial Drive and Cambridge Parkway to reach the Northern Artery. The Northern Artery was later renamed as the Monsignor O'Brien Highway in Cambridge and the McGrath Highway in Somerville.