I really enjoyed finding the East Brunswick Pedestrian Bridge cache that I wanted one of my own! So Next town over a little farther down Route 18 South from avgraphics Rt. 18 Pedestrian Bridge cache (GC20TZ8) I have mine!
You are looking for a small bison tube hidden at the pedestrian bridge crossing Rt 18 near Marlboro Road. You can access this cache easier from travelling on the South Bound side. There is parking nearby, But the parking area seems to be active 7 days a week, so there is always a chance of being muggled. If you are approaching from the North Bound side DO NOT PULL OVER ON THE ROADWAY to search for this cache. It is better to turn around and head South.
Please be careful as Route 18 has heavy traffic 24/7!
Congrats to NJTech for FTF!