You searched for: Author Allegheny County Division of Computer Services Geographic Information Systems Group; Modified by GDR for the Allegheny County CAD project, October 2008. Remove constraint Author: Allegheny County Division of Computer Services Geographic Information Systems Group; Modified by GDR for the Allegheny County CAD project, October 2008. Subject Transportation Remove constraint Subject: Transportation Institution Penn State Remove constraint Institution: Penn State Place Allegheny County, Pennsylvania, United States Remove constraint Place: Allegheny County, Pennsylvania, United States