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SOH Wind Engineering in partnership with The He Geo was contracted by Transport Engineering Design Incorporation to provide wind engineering services of the Bach Dang cable-stayed bridge, with two main spans of 240 m. Wind tunnel tests for determination of structural vibrations and wind loads were carried out for the in-service bridge as well as the bridge under construction. Wind buffeting, galloping, flutter, and vortex-induced vibrations were part of the structural vibrations investigated. Structural vibrations were investigated both with and without traffic present to capture the full range of bridge dynamics. Theoretical calculations and interpretation of wind tunnel test results were carried out.