Re-Inventing the Perfectly Pennsylvania Keystone Marker
School Zone (Northampton County)
COUNTY: Northampton
SHAPE: Standard 1-sided
STATUS: Extant
PA Rt. 61 Slateford, PA
This is a second “School Zone” marker, one of only a few other Keystones than town or stream name markers that survive. At one time almost all PA “traffic” signs were on these cast iron keystone-shaped signs.