West of Robbinsville, the road was maintained by the Trenton and Allentown Turnpike, which was chartered in 1856; east of Robbinsville, the turnpike followed modern-day County Route 526 to Allentown. From the border of Manalapan and Millstone townships east to the intersection with Woodward Road, the road was maintained by the Manalapan and Patton's Corner Turnpike; the road from there to Freehold was maintained as the Freehold and Manalapan Turnpike, chartered in 1858. The Freehold and Manalapan bought the portion of the Manalapan and Patton's Corner now signed Route 33. In addition, a small portion of the Englishtown and Millstone Turnpike was built along Route 33 from County Route 527A west to Millstone Road, though this was overtaken in the construction of the Freehold and Manalapan Turnpike, chartered in 1866 to connect Freehold and Manalapan. From Freehold to Jerseyville, Route 33 Business was maintained by the Freehold and Jerseyville Turnpike, chartered in 1866.