A traffic noise analysis is required for certain types of roadway projects, such as projects on new location or that add through-traffic lanes. A traffic noise analysis predicts existing and future traffic noise levels and determines if adjacent noise-sensitive land uses would be impacted by traffic noise. When traffic noise impacts are identified, noise abatement measures, such as sound walls, must be considered. If sound walls are determined to be feasible and reasonable, then noise abatement is incorporated into a project after detailed constructability analysis and public involvement.

Traffic noise compliance is governed by sections of NEPA that address the avoidance and mitigation of traffic noise impacts resulting from roadway projects and the Federal Aid Highway Act. This act mandates FHWA to develop and promulgate guidelines and standards for highway noise levels.

Refer to the TxDOT.gov Traffic Noise Toolkit webpage for more information and guidance on tools to prepare materials compliant with regulations.