There are Two Commute King Express Loops to Harrisburg...
A. Westbound Route 22 (Rte. 422 to Harrisburg) - Looping into - Eastbound Route 81 (to Lebanon)
B. Westbound Route 81 (to Harrisburg) - Looping into - Eastbound Route 22 (Rte. 422 to Lebanon)
Since these Routes are loops, use the opposite schedule for your return. If you use Schedule A in the morning, look to schedule B for your return (and vice-versa).