of I-476 between I-95 and the Pennsylvania Turnpike (I-276) runs north–south through Delaware and Montgomery counties and is officially known as the Mid-County Expressway and the Veterans Memorial Highway, as well as by the nickname the "Blue Route". The road's southern terminus is at a directional T interchange with I-95 near Chester, a city southwest of Philadelphia in Delaware County, near the Philadelphia International Airport. Heading north, the road passes under CSX's Philadelphia Subdivision rail line and has an interchange with MacDade Boulevard in Woodlyn, where it narrows to a four-lane parkway that runs parallel to the Crum Creek. It winds through the western Philadelphia suburbs of Wallingford and Swarthmore, where I-476 passes under SEPTA's Media/Wawa Line and comes to a diamond interchange with Baltimore Pike just west of Springfield. From here, the freeway crosses over SEPTA's Route 101 trolley line and continues north to Springfield, where it meets US 1 at a three-level diamond interchange. Past US 1, the parallel Crum Creek splits to the northwest and I-476 continues through wooded suburban areas. Along this stretch, the road briefly gains a third southbound lane. The freeway comes to a partial cloverleaf interchange with PA 3 in Broomall, where it widens to six lanes. The route continues to Radnor Township, which is part of the Philadelphia Main Line suburbs, reaching an interchange with US 30 west of Villanova. Stone monuments, including a large stone cairn atop a hill and a large crushed-stone image of a mythological griffin on a hillside, were constructed at the US 30 interchange to commemorate Radnor's history as part of the Welsh Tract. Proceeding northward, the road passes over SEPTA's Norristown High Speed Line before it crosses under Amtrak's Keystone Corridor rail line. The route enters Montgomery County and comes to an interchange with I-76 (Schuylkill Expressway) in West Conshohocken that also has access to PA 23. After crossing over Norfolk Southern's Harrisburg Line, the Schuylkill River, SEPTA's Manayunk/Norristown Line, and the Schuylkill River Trail on the Pearl Harbor Memorial Bridge, the freeway heads into Plymouth Township. In Plymouth Township, the route has interchanges with Ridge Pike and Chemical Road before passing over Norfolk Southern's Morrisville Line and reaching an interchange serving Germantown Pike and Plymouth Road in Plymouth Meeting. The entire length of the Blue Route is designated the Blue Route Scenic Byway, a Pennsylvania Scenic Byway. Plymouth Meeting to Clarks Summit In Plymouth Meeting,