Noise from traffic and construction on busy highways can be disruptive to people living and working nearby. The Iowa DOT does noise studies on large highway projects that could have a noise impact. There are maximum acceptable noise levels set by federal regulations and by Iowa DOT policy. If we think there might be an issue, we complete a noise study to determine if the project will cause a noise impact. We also talk to the neighbors of the highway project and try and come up with possible solutions.