The City of Marysville has been informed by multiple citizens of traffic safety concerns within the neighborhood. Based upon these concerns, the City Traffic Safety Committee (now NTS program) has evaluated each concern including performance of traffic counts upon several neighborhood streets. The traffic counts are summarized below:
Severity score 7.0
Date
Location
Average
Daily
Traffic (ADT)
Average
Speed
(mph)
85% Speed
(mph)
% of traffic
greater than
10 mph over
25 mph speed
limit
October 2013
48th Dr. NE
(north of
97th Pl. NE)
1034
27.3
31.9
4.5%
July/
August 2017
48th Dr. NE
(south of 100th
St. NE)
956
25.9
31.1
3.6%
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, it has been determined that traffic calming device installation is necessary upon 48th DR NE.