16, where Route 2 east merges with U.S. Route 3 south and Route 16 and continues as a four-lane, 35 mile per hour arterial parkway — managed by the Department of Conservation and Recreation — for the rest of its time in Cambridge. Route 2 follows Alewife Brook Parkway and Fresh Pond Parkway along its wrong way concurrency with Routes 3 and 16, before Route 16 heads west into Watertown. Route 2 and Route 3 concurrently start paralleling the Charles River as Memorial Drive, passing by Harvard University’s campus. It then heads southward on the Boston University Bridge into Boston proper, as it separates from Route 3. It winds through the Boston University campus as Mountfort Street and crosses over both the Massachusetts Turnpike and Commonwealth Avenue before heading due east towards Kenmore Square, while running parallel to U.S. Route 20. Immediately east of the Boston University campus, it crosses into Kenmore Square, which is also the eastern terminus of U.S. Route 20. From Kenmore Square, Route 2 follows Commonwealth Ave to Arlington St. It circles the Boston Public Garden, using Arlington, Boylston, and Charles Streets. Route 2 east goes along northbound Route 28 north at the intersection of Charles and Beacon Streets between Boston Common and the Boston Public Garden. As Route 28 north joins Storrow Drive, which shortly after would join Route 3, Route 28 south joins Route 2 and completes the loop around Boston Public Garden. History The route amalgamates and supersedes various named highways in some cases going back to the pre-automobile era. For example, parts of Route 2 are sometimes known as the Cambridge and Concord Turnpike and the Mohawk Trail. In the early 1920s, Route 2 was known as New England Interstate Route 7 (NE-7), a major road connecting Boston with Troy, New York. NE-7 ran roughly where Route 2A (the original surface alignment of Route 2) does now except near the New York state line. NE-7 used current Massachusetts Route 43, New York State Route 43 and New York State Route 66 to reach Troy. Current Route 2 from Williamstown to Petersburgh was previously numbered as Route 96. Route 2 connected as a highway in its current right-of-way at Alewife Brook Parkway at some point before 1937. An upgraded Route 2 was originally planned to continue as Boston's Northwest Expressway (merging with a re-routed U.S. Route 3 at the Arlington-Lexington or Arlington-Cambridge border)