to a junction with Interstate 695, the Inner Beltway, but this, along with the Inner Beltway itself, was cancelled in 1970, accounting for the abrupt narrowing at Alewife. In place of the highway project, the MBTA Red Line was extended from Harvard to Alewife in the 1980s. The Leominster to Ayer section opened on July 3, 1953, completing the expressway portion from Westminster to West Concord. Full grade separation between Route 128 and Alewife Brook Parkway was completed around 1970. Crosby's Corner intersection This major project has been planned since 1999. The intersection had an average of 90 accidents a year. The project was intended to solve the traffic and safety problems that had long occurred at the Crosby's Corner intersection (junction of Route 2 and 2A) in Concord. The project, which was expected to cost $71.9 million, widened Route 2 from Bedford Rd in Lincoln to 300 feet west of Sandy Pond Rd in Concord. The project eliminated the at grade intersection, realigned Route 2, and constructed new entrance and exit ramps along with new service roads next to Route 2. The full project included building a new overpass bridge over Route 2 and building multiple service roads next to Route 2. Work also consisted of a new signalized intersection. The project was put out to bid for contractors on September 19, 2011. A contractor was expected to be chosen over the winter and construction was expected to begin in Spring 2012 on the estimated $55 million project. The Army Corps of Engineers published a notice for this project, because of its impact on wetlands at Crosby's Corner. During the summer of 2012, activity on this portion of Route 2 included surveying and the installation of orange-painted stakes. Signs were added in January 2013 indicating that construction would start on January 14. As of April 2014 the project was underway and predicted completion was spring 2016. The project was completed in 2016, with a large improvement in traffic flow. Future Concord rotary A project to improve the Concord Rotary, at the convergence of Route 2, Route 2A/119 (Elm Street), Barrett's Mill Road and Commonwealth Avenue, has been in planning since 2003 or even earlier. More than 61,000 cars use this rotary on a typical day, and the backed up traffic can be significant. The improved intersection would include overpasses for local streets, while Route 2 traffic would continue unimpeded