The 85% speed is the commonly accepted engineering value indicating the speed at which 85% of drivers fall under and is found to be the speed at which the majority of drivers feel is a safe speed given the roadway conditions and surrounding environment. The 85% speed is also the value typically used to set speed limits and evaluate compliance with speed limits.

Residential roadways with a consistent speeding problem which may be effectively altered with traffic calming device installation typically have greater than 3% of drivers traveling at greater than 10 mph over the speed limit.

Based upon the cumulative results of the neighborhood traffic data, the Public Works Departments through the NTS program has determined that traffic calming device installation is necessary upon 84th ST NE from 51st AVE to 55th AVE NE, as well as 55th AVE NE from 84th ST NE to 100th ST NE.

A survey is being performed presently and until Wednesday, March 22nd of 2023 in order to solicit approval from all properties within 600' of a proposed traffic calming device or whose sole access(es) would be impacted by traffic calming device installation.  To move forward with the installation, greater than 60% of respondents were required to tally "yes" for the proposal. The proposal received over 60% approval and will be constructed.

This NTS project proposal includes the installation of eight (8) speed tables and two (2) raised crosswalks at the following approximate locations:

• 9806 55^th Ave. NE (speed table) 
• 9604 55^th Ave. NE (speed table) 
• 9513 55^th Ave. NE (speed table) 
• 9304 55^th Ave. NE (speed table) 
• 9025 55^th Ave. NE (speed table) 
• 8829 55^th Ave. NE (speed table) 
• 8611 55^th Ave. NE (speed table) 
• 8421 55^th Ave. NE (speed table)
• 84^th St. NE & 53^rd Dr. NE (east leg raised crosswalk)
• 84^th St. NE & 52^nd Dr. NE (west leg raised crosswalk)