Route 33 was originally planned as a freeway from US 1 in Trenton across New Jersey to Route 18 in Neptune. However, in 1967, the New Jersey Department of Transportation scaled back proposals to the current Route 33. Route 33 from near CR 527 in Manalapan to Halls Mill Road in Freehold Township was completed and opened in segments from 1971 to 1988.
Route 33 was originally planned as a freeway from US 1 in Trenton across New Jersey to Route 18 in Neptune. However in 1967, the New Jersey Department of Transportation scaled back proposals to the current Route 33. Route 33 from near CR 527 in Manalapan to Halls Mill Road in Freehold Township was completed and opened in segments from 1971 to 1988.