55th Ave NE (84th ST NE to 100th ST NE)

Severity Score 6.0

Date Location
Average Daily
Traffic (ADT)
Average
Speed
(mph)
85% Speed
(mph)
% of vehicles
traveling greater
than 10 mph over
25 mph speed
limit
August 2014
55th Ave NE
(south of 95th
St NE)
1915 26.5 30.9 2.5%
September 2015
55th Ave NE
(near 92nd ST NE)
913 28.9 34.8 14.3%
February 2017
55th Ave NE
(between 84th
ST NE & 88th
ST NE)
1741 28.7 33.3 8.9%

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 60th DR NE from Grove ST to 88th ST NE.

A survey will be performed in January-February of 2023 to solicit approval from all properties within 600' of a proposed traffic calming devices or whose sole access(es) would be impacted by traffic calming device installation.  To move forward with installation, greater than 60% of respondents are required to tally "yes" for the proposal. 

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

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