Information specific to stop sign design, standard, and application is detailed in the MUTCD guidelines. These guidelines require regulatory stop signs to be an octagon and have a white legend and border on a red background. Guidance about the installation of stop signs where a full stop is necessary at an intersection and on minor-street approaches as deemed necessary following engineering judgment is provided.  You may also understand the specifics related to the use of supplemental ‘All way’ plaques and multi-way stop applications in these guidelines.