Route 55 begins at a signalized intersection with Route 47 in the Port Elizabeth section of Maurice River Township, Cumberland County, heading to the north as a two-lane undivided road through wooded areas. At the southern terminus, the road continues south as part of Route 47. A short distance after beginning, the road widens into a four-lane divided freeway and comes to a southbound exit and northbound entrance with Schooner Landing Road. Past this interchange, Route 55 enters Millville and crosses over the Manantico Creek as it heads into built-up areas. The freeway continues north to an interchange with Route 49.