 Route 28 begins at an interchange with U.S. Route 22 in Bridgewater Township , Somerset County , heading to the southeast on Easton Turnpike , a two @-@ lane undivided road with a speed limit of 45 mph ( 72 km / h ) . Past this interchange , Easton Turnpike continues to the northwest as County Route 614 . The route heads through predominantly residential areas , eventually forming the border between Raritan to the southwest and Bridgewater Township to the northeast . It intersects the northern terminus of County Route 567 ( First Avenue ) before heading into business areas , where it comes to the modified Somerville Circle , where Route 28 intersects U.S. Route 202 and U.S. Route 206 . This traffic circle has been modified to allow U.S. Route 202 to pass over and interchange with the circle , while U.S. Route 206 and Route 28 continue through the circle . Past the Somerville Circle , Route 28 becomes a 35 mph ( 56 km / h ) road named West End Avenue that intersects County Route 644 ( Frelinghuysen Avenue ) just before entering Somerville . Here , the route passes residences and crosses County Route 643 ( Mountain Avenue ) before coming to an intersection with County Route 626 ( Somerset Street ) . At this intersection , Route 28 bears to the left and heads east on 30 mph ( 48 km / h ) West Main Street , which proceeds through the business district of downtown Somerville . The route becomes East Main Street upon crossing Bridge Street . 
