3-Way Signs

At intersections where all approaches are controlled by STOP signs, a supplemental plaque R1-3 or R1-4 shall be mounted below each STOP sign.

Option: The ALL-WAY R1-4 supplemental plaque may be used instead of the 3-WAY R1-3 supplemental plaque.

Section 2B.54 Other Regulatory Signs Option: Regulatory word message signs other than those classified and specified in this Manual and the “Standard Highways Sign” book may be developed to aid the enforcement of other laws or regulations.