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- From north of the Turnpike interchange to the Penndel interchange:
- Addition of a third travel lane in each direction and auxiliary lanes between interchanges
- Increased median width to provide minimum 12’-wide inside shoulder
- From north of the Turnpike interchange to north of the Neshaminy interchange
- Profile raised to improve vertical clearance over SR 2044 (Rockhill Drive)
- Between the PA Turnpike interchange and the Neshaminy interchange
- Addition of an auxiliary lane in both directions
- North of the Neshaminy interchange to southern limit of frontage (service) roads
- Realignment of U.S. 1 SB over Neshaminy Creek and U.S. 1 NB over Business Route 1/CSX/SEPTA to facilitate construction
