This one–way pairing, which carries two lanes in each direction, curves north and continues through downtown Trenton. At the Trenton Battle Monument, the road reaches an intersection with the southern terminus of Route 31 and US 206 turns northeast onto another one-way pairing that follows Brunswick Avenue northbound and Martin Luther King Jr. Boulevard southbound, with each road being two-way but only carrying one direction of US 206. The road continues through neighborhoods, with southbound US 206 forming the border between Ewing Township to the northwest and Trenton to the southeast as a county-maintained road at the Calhoun Street intersection. At this point, southbound US 206 becomes concurrent with CR 583. At the junction with Spruce Street, northbound US 206 becomes the border between Lawrence Township and Trenton, becoming state-maintained, while southbound US 206/CR 583 fully crosses into Lawrence Township. Northbound US 206 widens into a four-lane divided highway as it comes to the Brunswick Circle with US 1 Business. At this point, US 1 Business continues northeast on Brunswick Pike while northbound US 206 heads north as a two-lane undivided road called Lawrence Road. CR 645 links the Brunswick Circle to southbound US 206/CR 583.