Failure to appear for a driver improvement interview at the time and place stated by the department in its notice as provided in RCW 46.20.322 and 46.20.323 or failure to request a driver improvement interview within ten days as provided in RCW 46.20.325 constitutes a waiver of a driver improvement interview, and the department may take action without such driver improvement interview, or the department may, upon request of the person whose privilege to drive may be affected, or at its own option, re-open the case, take evidence, change or set aside any order theretofore made, or grant a driver improvement interview.