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Consideration of request from Engineering Division to install all-way stop control at the Vienna Avenue intersection with 102nd Street
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Submitted by:
Michael May, PE, PTOE, RSP1
Department:
DPW - Engineering
A. Issue
Visual obstructions may block lines of sight and may not allow a road user to yield or stop in compliance with the normal right-of-way rule.
B. Background/Options
The City has adopted a policy that follows national standards related to the installation of yield and stop signs. The policy allows residents to request consideration for stop signs when they believe a condition, as described in the Manual on Uniform Traffic Control Devices (MUTCD), has been met. Staff received resident requests for stop control at the Vienna Avenue and 102nd Avenue intersection and analyzed if such traffic control is warranted.
The warrants for two-way stop control are outlined below.
• Traffic Volumes: The combined volume of all vehicular, pedestrian, and bicycle volume entering from all approaches averages more than 2,000 units per day. This warrant was not analyzed.
• Vision Issue(s): Ability to see conflicting traffic on an approach is not sufficient to allow a road user to yield or stop in compliance with the normal right-of-way rule. The location of the house in the northwest corner blocks adequate lines of sight.
• Crashes: The intersection has 3+ crashes over a two-year period or 5+ crashes in a three-year period susceptible to correction by yield or two-way stop. No crashes occurred in the five-year period of January 1, 2019 through December 31, 2023. Note that an angle crash did occur in April 2024 involving southbound vs westbound motorists - the crash report was not available at the time this memorandum was prepared to determine crash severity.
Two-way stop control is warranted. Staff analyzed intersection sight distance under two scenarios: traffic stops on 102nd Street with no stops on Vienna Avenue, and traffic stops on Vienna Avenue with no stops on 102nd Street. In review of the intersection sight distance, the curvature of the streets and the location of other obstructions (10204 Vienna Avenue fence along 102nd Avenue, city Norway maple trees along Vienna Avenue) does not provide adequate lines of sight for two-way stop control.
Therefore, all-way stop control is warranted and recommended at the Vienna Avenue intersection with 102nd Street.
C. Strategic Plan (Area of Focus)
Priority 2: Public Safety, Goal 2. Proactively address pedestrian, bicycle, and vehicular safety
D. Fiscal Impact
Minor expenses for the in-house creation and installation of signs. The existing sign budget will
accommodate these expenses.
E. Recommendation
Direct staff to prepare an ordinance to install all-way stop control at the Vienna Avenue intersection with 102nd Street.