PA 75 and PA 416 split from PA 16 and head northeast out of Mercersburg .
PA 416 turns northwest for a concurrency with PA 16 and heads to Mercersburg , where PA 75 joins the two routes .
PA 75 and PA   split from PA 16 and head northeast out of Mercersburg .
PA 416 turns northwest for a concurrency with PA 16 and heads to Mercersburg , where PA 75 joins the two routes .