Under what conditions would you recommend the use of each of the following intersection control devices at urban intersections below:
(a) yield sign
(b) stop sign
(c) multiway stop sign
What will be an ideal response?
(a) A yield sign is used at the junction where a minor road intersects a major
road. The sign would be placed on the minor road if its approach speed is greater
than 10 mi/h. It is also warranted where a separate or channelized right turn lane
exists without an adequate acceleration lane.
(b) A stop sign is used where an approaching vehicle is required to stop before
entering an intersection. The warrants for stop signs suggest that a stop sign may
be used on a minor road when it intersects a major road, at an unsignalized
intersection, and where a combination of high speed, restricted view, and serious
crashes indicate the necessity for such a control.
(c) A multiway stop sign is normally used when the traffic volumes on all
intersection approaches are approximately equal and minimum volume warrants
are met; it is also used as a safety measure at some intersections.
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