Complex sentence: At milepost 21.06, U.S. Route 202 and Route 31 intersect County Route 611 (South Main Street), widens to six lanes, and crosses into Flemington at 21.72 miles.
Split into simpler sentences: At milepost 21.06, U.S. Route 202 and Route 31 intersect County Route 611 (South Main Street). Past that intersection, the road widens to six lanes and crosses into Flemington at 21.72 miles.