Home BlogData Visualization Mapping the Declining State of Bridges in the United States

Mapping the Declining State of Bridges in the United States

by Elaine Ding
Bridges in the U.S.

Jonah Adkins, a cartographer and geographic information systems consultant, has created Bridges of America, a data visualization illustrating the usage and structural health of the 600,000 bridges in the United States. Bridges of America uses data from the Federal Highway Administration’s National Bridge Inventory, which logs bridge conditions dating back to 1992, and allows users to examine bridges by daily traffic count and their health, as broken down into the categories: “ok,” “functionally obsolete” (meaning the bridge does not meet modern standards but may be in good health), and “structurally deficient” (meaning the bridge requires significant repair or even replacement). As of 2013, this data shows that 10 percent of U.S. bridges qualify as “structurally deficient.”

Take a look.

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