The Commissioner of Highways may, when requested by the governing body of a state institution, assume the maintenance of any highway within the grounds of such state institution that has been established and constructed by such institution to standards acceptable to the Commissioner of Highways. Any such highways accepted for maintenance by the Commissioner of Highways under the provisions of this section shall be a part of the primary state highway system, but the state institution shall continue to exercise police power over such highways.
Va. Code § 33.2-313