Locations that currently have two-way stop control also have warrants for determining if the intersection would be better suited with all-way stop controls. Generally all-way stop controls are used when the vehicle volumes of the intersecting streets are approximately equal. Requests to review intersections for multi-way stop control are evaluated using the warrants established by the CA-MUTCD as follows:
Interim Measure
Where traffic control signals are justified, the multi-way stop is an interim measure that can be installed quickly to control traffic while arrangements are being made for the installation of the traffic control signal.
Crashes
A crash problem, as indicated by 5 or more reported crashes in a 12-month period that are susceptible to correction by a multi-way stop installation. Such crashes include right - and left-turn collisions as well as right-angle collisions.
Minimum Volumes
The vehicular volume entering the intersection from the major street approaches averages at least 300 vehicles per hour for any 8 hours of an average day, and the combined vehicular, pedestrian, and bicycle volume entering the intersection from the minor street approaches averages at least 200 units per hour for the same 8 hours, with an average delay to minor-street vehicular traffic of at least 30 seconds per vehicle during the highest hour.
Posted Speed Limit
If posted speed of the major-street traffic exceeds 40 miles per hour the minimum vehicular volume warrants are 70% of the above values.
Multiple Warrants
Where no single warrant is satisfied, but where crash and volume warrants are all satisfied to 80% of the minimum values, a multi-way stop control may also be considered.
If there is an intersection that you think we should investigate for the installation of stop signs please contact Traffic Engineering at 707-543-3814.