Pennsylvania Route 3 (PA 3) is a  state highway located in the southeastern portion of Pennsylvania. The route connects U.S. Route 322 Business (US 322 Bus.) in West Chester with PA 611 in Philadelphia. The route begins in downtown West Chester and heads east out of town as a one-way pair of streets. Between West Chester and Upper Darby Township, PA 3 follows a four-lane divided highway known as West Chester Pike through suburban areas. Along this stretch, the route passes through Edgmont, Newtown Square, Broomall, and Havertown. The route has an interchange with Interstate 476 (I-476) between Broomall and Havertown. Upon reaching Upper Darby, PA 3 heads into Philadelphia along Market Street. In Philadelphia, the route follows multiple one-way pairs, running along Chestnut Street and Walnut Street in West Philadelphia before heading into Center City Philadelphia along Market Street and John F. Kennedy Boulevard and ending at Philadelphia City Hall.