Serves as a senior level with recognized expertise which may include papers and/or credits published in nationally recognized transportation literature; presentations to national, regional or State professional groups, active membership in recognized national organizations or professional groups dealing with transportation engineering or other demonstrated expertise in a transportation engineering specialty such as concrete, steel, bituminous materials, environmental measurements, geotechnical evaluations, instrumental analysis, computer application, structural analysis, electronics, metallography, corrosion, welding and mathematical analysis, transportation systems analysis, route location, project evaluation, transportation planning, design, pavement, hydraulics, and other related fields. Work is performed within a defined framework of policy, but the incumbent independently makes engineering decisions within that framework and may make or assist in making broad decisions in setting objectives and goals.