We conduct DOT and FHWA noise studies, including alternatives analyses, NEPA studies, and final design. We conduct measurements, predict noise levels using STAMINA and TNM, assess impact, provide noise level contours, and design mitigation measures such as noise walls and berms. We conduct construction noise impact analyses, design mitigation measures, and conduct compliance monitoring. Also, we conduct research projects such as pavement noise analyses and measurements, noise wall performance measurements, and model accuracy studies.