The western terminus of the route is at the Pennsylvania Route 82 / Pennsylvania Route 842 concurrency in Unionville, Chester County.
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PA 162 begins at an intersection with PA 82/PA 842 in the community of Unionville in East Marlborough Township, heading north on two-lane undivided Embreeville Road.
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Along this stretch, the route forms a concurrency with PA 82 in Unionville, where it intersects the western terminus of PA 162.