The department may issue a permit for a connection not meeting department location and spacing criteria standards if it finds that a conforming connection is not attainable at the time of the permit application submittal and that denial would leave the property without a reasonable access to the public road system. The department may issue a connection permit requiring a legally enforceable joint-use connection when determined to be in the best interest of the state for restoring or maintaining the operational efficiency and safety of the state highway. Nonconforming connection permits shall specify conditions or limits including:

(1) Traffic volume. The maximum vehicular usage of the connection shall be specified in the permit.

(2) Future alternate access. The permit shall specify that a conforming connection be constructed when future alternate means of access become available, and that the nonconforming connection be removed.

(3) Users. The permit shall specify the properties to be served by the connection; and any other conditions as necessary to carry out the provisions of chapter 47.50 RCW.