Variance permits may be issued, at the discretion of the department, for certain connections not meeting the access classification location and spacing or that exceed the number of connections allowed by the standards adopted for a particular highway segment. These permits may be allowed if conditions warrant and are demonstrated to the satisfaction of the department by a traffic analysis, signed and sealed by a qualified professional engineer who is registered in accordance with chapter 18.43 RCW, which is included with the connection permit application. The variance permit will remain in effect unless a new permit is required due to changes in property site use in compliance with WAC 468-51-110 or unless permit modification, revocation, or closure of the variance permitted connection is required as provided for in WAC 468-51-120. The department may issue a connection permit requiring a legally enforceable joint-use connection when it is determined to be in the best interest of the state for restoring or maintaining the operational efficiency and safety of the state highway. Variance connection permits shall specify conditions or limits including, but not limited to:

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

(2) 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.