Rd and Abbott Ave. At the intersection with Mt. Elam Rd, a traffic light remains in use on the eastbound side. Continuing east into Leominster, Interstate 190 splits off, heading south to Worcester. Route 2 continues east to Middlesex County and enters Boston's outer loop at the interchange with Interstate 495 in Littleton. It continues into Acton, where Route 2 reduces its speed to 45 miles per hour, and becomes a four-lane arterial road with some at-grade intersections. At the Concord Rotary, a major traffic choke point, Route 2 intersects with Route 2A and the eastern terminus of Route 119 (which is concurrent with Route 2A). After the rotary, the road loses its dividing wall as it passes by the State Police (who have an emergency-only traffic light) and over the Assabet River. Route 2A formerly broke away from Route 2 at the next traffic light to go left into Concord but is now overlaid with Route 2. At Crosby's Corner, the sixth intersection after the rotary, Route 2A exits under the highway while Route 2 veers right (but still heads east). While the highway is divided across Lincoln, there is a single traffic light intersection at Bedford Road. At this point, Route 2 enters Lexington and still is a divided four-lane road with surface intersections. It then heads to Boston's inner belt, and as it crosses Interstate 95/Route 128, it becomes a six lane controlled access highway with a speed limit of 55 miles per hour. In Belmont, Route 2 remains a six-lane highway, and then becomes an eight-lane controlled-access highway at Exit 132 (formerly 57) in Arlington, where U.S. Route 3 would have joined it from the north. At Exit 135 (formerly 60), the freeway narrows width to six lanes. The section of expressway from Route 128 to the Cambridge line meets the standards of an interstate highway. As the highway enters Cambridge, the highway reduces its speed limit back to 45 miles per hour and becomes a five lane limited access highway (three lanes heading east, two lanes heading west), with a strip of residential and transit-oriented development on its eastbound side, including an off-ramp that serves the MBTA Alewife Station, Cambridge Discovery Park and development to the south and west of the station. After the Alewife exit, the highway narrows again to four lanes. The highway then meets a large at-grade intersection with Routes 3 and