Pennsylvania Department of Transportation
- Lists driver and vehicle services, traveller and construction information, and details on public safety.
Pennsylvania Highways
- Includes details and history on state-maintained roadways; special pages on Harrisburg, Philadelphia, Pittsburgh, and Erie; exit guides; and photographs.
Central PA/MD Roads - Includes route logs and photographs.
City of Pittsburgh Step Trek - Studies in detail streets in Pittsburgh which are really stairways and streets so steep they need stairways as sidewalks.
Fayette Expressway Completion Organization - Citizens' group site on new toll roads in the southwest part of the state. Includes maps.
Future Interstate 99 North of I-80 - Covers the conditions of existing roadways which are planned to carry an I-99 extension.
Meadville Area Highways - Covers the city and surrounding area in the west part of the state. Includes history and photographs.
MPG Roads - Specific to State College and surroundings. Also covers Georgia and Michigan.
Pennsylvania and Pittsburgh Roads - Historic maps and information about the roads in the Pittsburgh area.
Pennways - Essays on transportation history in the Philadelphia area.
Philadelphia Area Roads, Crossings and Exits - History and current information on the highway and bridge system in the metropolitan area.
The SWPA Roads Project - Includes histories, photo essays, and discussions.
