The Board shall have a total membership of 17 members that shall consist of 14 nonlegislative citizen members and three ex officio members as follows: the Secretary of Transportation, the Commissioner of Highways, and the Director of the Department of Rail and Public Transportation. The nonlegislative citizen members shall be appointed by the Governor as provided in § 33.2-201, subject to confirmation by the General Assembly. Appointments of nonlegislative citizen members shall be for terms of four years commencing on July 1, upon the expiration of the terms of the existing members, respectively. Vacancies shall be filled by appointment by the Governor for the unexpired term and shall be effective until 30 days after the next meeting of the ensuing General Assembly and, if confirmed, thereafter for the remainder of the term. No nonlegislative citizen member shall be eligible to serve more than two consecutive four-year terms. The remainder of any term to which a member is appointed to fill a vacancy shall not constitute a term in determining that member’s eligibility for reappointment. Ex officio members of the Board shall serve terms coincident with their terms of office. The Secretary shall serve as chairman of the Board and shall have voting privileges only in the event of a tie. The senior nonlegislative citizen member shall serve as vice-chairman of the Board and shall preside during the absence of the chairman. In the event that more than one nonlegislative citizen member of the Board may be considered the senior nonlegislative citizen member, the Board shall elect the vice-chairman from such senior nonlegislative citizen members. The Director of the Department of Rail and Public Transportation and the Commissioner of Highways shall not have voting privileges.