Williamson Pennsylvania Traffic 2024-12-20 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Williamson Pennsylvania Lemasters, PA 5.08 mi Saint Thomas, PA 6.94 mi Greencastle, PA 7.89 miInterstate highway exits close to Williamson Pennsylvania Exit 10, i81 9.62 mi Exit 5, i81 10.32 mi Exit 3, i81 12.56 miInterstate highways close to Williamson Pennsylvania i81 map 9.62 mi i70 map 24.67 mi i76 map 26.09 miState roads close to Williamson Pennsylvania PA 995 map 0.09 mi PA 416 map 5.63 mi US 30 PA map 6.87 mi