Director Lewis is chairman of the Rhode Island Public Rail Corporation and a board member of the Rhode Island Public Transit Authority, the State Planning Council, the State Traffic Commission, and the Rhode Island Turnpike and Bridge Authority. He is also past-president of the American Association of State Highway and Transportation Officials (AASHTO) and chairs AASHTO's Standing Committee on Highways.
Director Lewis is a member of both the Executive Committee and SHRP II Oversight Committee of the Transportation Research Board (TRB), as well as serves on the Executive Committee for the Northeast Corridor Commission (NEC).