- Southern Terminus:
- Hightstown Road (CR 571/CR 526) and Cranbury Road (Mercer CR 615) in West Windsor
- Northern Terminus:
- Washington Road (CR 571/CR 526) in West Windsor
- 0.32 miles
NJ 64 is a bridge over the New Jersey Transit railroad tracks along CR 571/CR 526 near the Princeton Junction train station. It has a state route number because it is maintained by the state, even though it does not connect to any other state route. NJ 64 is multiplexed with CR 571/CR 526 for its entire length. It is signed in that there is a single NJ 64 shield hanging from the traffic light at its southern terminus. There are no route shields along the route itself.