Route 138 is a state highway located entirely in Monmouth County, New Jersey that extends for 3.52 miles (5.66 km).

The highway crosses over the northbound lanes and reaches exit 36, which serves the Parkway and a nearby park and ride.

[3] Route 138 continues further, passing to the south and to the north of commercial complexes along with several residential areas.

The highway then proceeds to a small interchange with Club Drive, which serves a mix of residential homes and commercial buildings.

[7] The proposal lasted through the 1970s, along with a cost adjustment in 1972, inflating the amount to construct the freeway at $101 million (1972 USD).

[9] By the end of the 1970s, the Route 38 freeway was facing opposition and limited resources, so the project was shelved.