 Past the Route 122 intersection , US 22 has an interchange with exit 3 of I @-@ 78 and the western endpoint of Route 173 . From there , US 22 is concurrent with I @-@ 78 through a mountainous and rural area of western New Jersey . I @-@ 78 / US 22 follow a six @-@ lane freeway east through Greenwich Township , coming to a westbound exit and eastbound entrance with CR 637 . The road turns southeast and has an eastbound exit and westbound entrance with CR 632 in Franklin Township . Within the ramps for this interchange , there are weigh stations in both directions . A short distance after this interchange , I @-@ 78 / US 22 crosses the Musconetcong River into Bloomsbury , Hunterdon County . In Bloomsbury , the road has an interchange with Route 173 . After this interchange , the freeway enters Bethlehem Township , with Route 173 closely running to the north of I @-@ 78 / US 22 . The road has rest areas in both directions before it passes over Norfolk Southern 's Lehigh Line and turns southeast to cross the Musconetcong Mountains . 
