CR 529 is a short north/south route extending from Edison to Watchung. It begins at Woodbridge Avenue (CR 514). In Edison, it is known as Plainfield Avenue, but it changes names to becomes Stelton Road as it crosses into Piscataway. After an interchange with the Middlesex Freeway (I-287), Stelton Road curves to the west. CR 529 then turns north onto Washington Avenue, which it follows to Dunellen. It passes through Washington Rock State Park, emerging from the park in Watchung as Washington Rock Road. It ends at Mountain Boulevard (CR 527).
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