Peer Exchange Report on Corrosion Prevention and Mitigation for Highway Bridges

FHWA conducted two regional peer exchanges: (1) for the Midwest States which have environments with arid conditions or that experience frequent freeze/thaw cycles and use de-icing chemicals on their highway bridges, and (2) for the Northeast, Southeast, and West States which have environments that experience freeze/thaw cycles or have highway bridges exposed to a saltwater environment. These peer exchanges focused on State practices and materials used that mitigate bridge corrosion. The results of the peer exchanges can be categorized as (1) actions States are undertaking to slow down, reduce, and prevent corrosion from occurring to their existing bridges and (2) policy changes States are making to their design standards, details, and material specifications to eliminate root causes of corrosion.