- Lincoln Highway Heritage Corridor
 - Offers travel and historical preservation information promoting the 150 mile section in southwestern Pennsylvania. - PA Route 6 Tourist Association
- Features a guide to travelling along the Grand Army of the Republic Highway.
- Pennsylvania Highways
- Source for information pertaining to the highway system of the Commonwealth of Pennsylvania.
- Pennsylvania Turnpike (2)
- Find out about Pennsylvania Turnpike, a toll highway system in the state of Pennsylvania through sites offering maps, traffic news, pictures, construction information, and history of first long-distance rural freeway in the United States.
- Pennsylvania's Neighborhood Traffic Calming Resource
- Offers information, advice, and photos related to neighbourhood traffic calming concepts.
- phillyroads.com
- Provides overviews of expressways and bridges, exit lists, and current traffic links.
- PhillyRoads: Betsy Ross Bridge (NJ 90)
- Contains the facts and construction history of the steel through-truss bridge that was the first major bridge in the U.S. to be named after a woman.
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