 Route 19 begins at the intersection of County Route 509 ( Broad Street ) and County Route 609 ( Colfax Avenue ) in Clifton . From this intersection , it heads north concurrenct with County Route 509 as a four @-@ lane divided highway with a 35 mph ( 56 km / h ) speed limit , soon interchanging with U.S. Route 46 . Past US 46 , the road crosses a brook and County Route 509 ( Broad Street ) splits off , with Route 19 interchanging with the Garden State Parkway . Route 19 continues past the Garden State Parkway as a six @-@ lane 40 mph ( 64 km / h ) freeway surrounded by trees , coming to a northbound exit and southbound entrance with County Route 509 . 
