 Past this interchange, the freeway widens to six lanes and passes near residential and commercial development, coming to a westbound welcome center and a westbound toll plaza for the Interstate 78 Toll Bridge.From here, I-78 runs through wooded areas and turns southeast, heading onto the Interstate 78 Toll Bridge which carries the freeway over PA 611 and the Delaware Canal before crossing the Delaware River, where I-78 leaves Pennsylvania for New Jersey.Construction of the freeway between Lebanon and Lehigh counties took place between 1950 and 1970, originally as an upgraded alignment of US 22.