Evaluation of ARMCO Sound Barriers on Two Bridges on I-495: Final Report

Report No: 82-R21

Published in 1981

About the report:

The purpose of this study was to determine the effectiveness of ARMCO double-wall, steel noise barriers attached to bridge parapets so as to provide continuity for roadside barriers. Measurements were taken opposite the sites of the discontinuities on two bridges before and after the gaps were filled. The measurements were recorded in both the analog and digital modes using the technique described in reference 2 of this report. It was concluded that the bridge barriers significantly contributed to lessening the impact of traffic noise on the adjacent communities. It was also concluded that the expansion joints used in the bridge decks created an annoying noise when crossed by traffic, and that such noise should be ameliorated where it occurs.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


  •  J. K. Haviland, David F. Noble

Last updated: January 20, 2024

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