 After an extremely contentious argument about its route, it opened about five years later.The road started near present-day Technology Square in East Cambridge, where it intersected with the Cambridge and Concord Turnpike (now Broadway), headed roughly northwest along what are now Hampshire and Beacon Streets, passed by the 'Foot of the Rocks' in West Cambridge (now along Massachusetts Avenue in Arlington), and onwards to Lexington by today's Westminster and Lowell Streets.From there, it continued through Burlington, Bedford, and Billerica, the section of which is still called the Middlesex Turnpike as far as Concord Road in Billerica (though between 2010 and 2016 the roadway officially named Middlesex Turnpike was diverted from the right of way over a stretch of half a mile or so in Burlington near Bedford Street in order to bypass a residential neighborhood; the old roadway still exists under the name of Middlesex Turnpike Extension and is directly connected to Middlesex Turnpike at the southern end but is cut off from the heavy traffic on the Turnpike at the northern end).