The average age of a bridge in the U.S.


of bridges are over 50 years old


Annual spending increase to meet bridge rehabilitation needs


Estimated cost of backlog bridge rehabilitation

A Sustainable Composite Bridge Story


The Rusty Bridge

Steel is low cost material with high tensile strength, which is why you can find it in just about every bridge you cross. Steel girders, cables, and rebar have become the standard building blocks of bridges over the last 70 years. Bridges made with steel turn into bridges made with rust, and bridges made with rust become structurally deficient very quickly. As stated above, there is already $123 billion worth of backlog work for bridge rehabilitation to mitigate structural deficiency. This cost does not account for any costs related to replacing these bridges in the near future. It is time for a more sustainable bridge option. 

The FRP Bridge

The 2017 Infrastructure Report recommends, "Bridge owners should consider the costs across a bridge's entire lifecycle to make smart design decisions and prioritize maintenance and rehabilitation." The composite FRP bridge is the solution to this recommendation. AIT Bridges' composite bridge systems are tested to last over 100 years, at least 30 years longer than the average steel bridge. Additionally, because our bridge systems use FRP's instead of steel, they need little to zero maintenance over its lifecycle. Today, AIT Bridges offers the composite arch bridge system and the composite beam bridge system; two building blocks capable of replacing most bridges across the country.


Institute for Sustainable Infrastructure

ISI icon.png

ISI, Envision, & AIT

ISI was founded by the American Public Works Association (APWA), the American Society for Civil Engineers (ASCE), and the American Council of Engineering Companies (ACEC). ISI has developed and manages Envision, a framework that encourages systemic changes in the planning, design and delivery of sustainable and resilient infrastructure through education, training, and third-party project verification. AIT Bridges joined ISI as members in May of 2020, with the goal of promoting awareness of the sustainability of our bridge systems. AIT Bridges is looking to gain its first Envision Project Award within the next year, and become the catalyst for sustainability in the bridge industry

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