From Harrisburg and Points West: 1  Follow I-78E towards Allentown. 2  Merge onto US-22 via Exit 51 toward PA-309/PA Turnpike/L.V.I. 3  Merge onto PA-987N/ Airport Rd.  Continue past the airport entrance and make a left onto E Race 1  St. Follow E Race St. for 1 mile and make a right turn onto WillowBrook  Dr.