WHEN does MoDOT get involved in sound wall construction?
MoDOT considers constructing sound walls as part of new road construction projects or in cooperation with cities and counties. New Road Construction MoDOT will provide noise reduction whenever through lanes are added or there are changes the alignment of a roadway. Criteria For New Road Construction Projects The sound wall must reduce noise levels by at least five decibels for all benefitted homeowners. The sound wall must benefit more than one homeowner. The sound wall must be 18 feet or less in height. The sound wall must not pose a traffic safety hazard. The majority of the benefitted residents must agree that a sound wall is desired. Cooperation With Cities And Counties MoDOT will also provide noise reduction near existing highways, with the cities and counties participating in the cost of the design and the construction of the wall. Criteria For Cooperative Projects The noise reduction must meet all of the new road construction criteria. A local government entity must request the
