We still working on gathering information on Dayton Avenue North's arterial status. We should have that information on June 25th at which time we will move forward on that issue. Joe O'leary (President of Broadview Community Council) has sent a letter to the Mayor and Council members asking for radar signs and and a four-way stop at 117th and Dayton (because of the crosswalk there).
Things you can do in the mean time.
Call 625-5011 and report drivers that are speeding down dayton.
You can see if you can have a tree planted in the parking strip area between your property and the road. This will help create the illusion that Dayton is narrower.
http://www.ci.seattle.wa.us/transportation/plantingstrip.htm
a) Contact Nolan Rundquist (nolan.rundquist@seattle.gov) he can tell you how to get a permit (free) and the other steps needed to plant a tree.
b) Call to have utilities marked (free) at 800-424-5555