 Upon leaving the downtown area, the route turns north onto Gaston Avenue and heads into residential areas again, with County Route 612 continuing east on Main Street. At the intersection with Union Avenue, Route 28 turns to the east to follow that road, which has a 40 mph (64 km / h) speed limit. The route continues past residential neighborhoods containing some businesses, briefly forming the border between Bridgewater Township to the north and Somerville to the south before fully entering Bridgewater Township. It intersects County Route 633 (Finderne Avenue) before crossing County Route 675 (Chimney Rock Road), where Route 28 widens into a four-lane divided highway that heads through industrial and commercial areas. The road makes a junction with County Route 685 (Promenade Boulevard) before coming to an interchange with Interstate 287. Past this interchange, the route continues into Bound Brook as a two-lane undivided road with a 35 mph (56 km / h) speed limit and heads through business areas. In Bound Brook, Route 28 intersects the southern terminus of County Route 525 (Thompson Avenue) and County Route 635 (Vosseller Avenue) before heading into more residential surroundings and crossing County Route 527 (Mountain Avenue).
