As one of the most heavily traveled states in the country, Pennsylvania’s vast transportation network demonstrates technological changes from the 18th century to the present.

These changes, and the growth of Pennsylvania and the United States, would not be possible without bridges. Pennsylvania’s key location placed the Commonwealth at the forefront of development and application of innovative bridge technology and engineering.

From stone arches and covered bridges to metal trusses and cable suspension bridges, Pennsylvania has a diverse collection of bridge types across its landscape. This includes over 400 historic bridges, bridges that are eligible for listing, or are listed, in the National Register of Historic Places.

To showcase this collection, PennDOT created the Historic Bridges of Pennsylvania web map, an interactive GIS layer with locational and basic historical information about each bridge. It is important to note that this web map only includes extant historic bridges that are publicly owned by a federal, state, or local government agency or a toll commission organization.

The map does not include bridges owned by private entities such as railroads, businesses, or private individuals. For more information on other historic bridges that may not be featured on this map, visit the PA SHPO’s PA-SHARE website.

You can read more in an article in the pahistoricpreservation.com web site at: https://tinyurl.com/ydzu2chc.