 This left a gap of 1.4 miles of the former PA 31 which ran concurrently with PA 18 (and very briefly with US 40) between the termini of the newly designated routes (PA 844 east, PA 136 west).As a result, this gap did not need renumbered or any additional designations.The Glades Pike Inn is a notable inn situated on the Glades Pike section of PA 31 in Somerset.