You can also fill out a RPZ survey at: https://www.surveymonkey.com/r/SeattleRPZ by March 31, 2016. Please note that you don't need to answer every question to complete the survey. The SDOT survey asks for demographic info such as household income, race, age, etc, and personally identifiable info in the form of an email address. If there is information that you would rather not provide, you can just skip those questions.
You can also send written comments to RPZPolicyReview@seattle.gov or contact Becky Edmonds at (206) 684-5104.
The North Beacon Hill Council will have this topic on the agenda for the Tuesday, April 5th meeting. Becky Edmonds will be attending to make a presentation on the RPZ Policy Review. More info is available at: http://www.seattle.gov/transportation/parking/rpz_policy_review.htm