When used at the right place, and under the right conditions, a stop sign is one of our most valuable and effective traffic control devices. We use national and state standards when determining if a stop sign is needed. Stop signs are generally used to help drivers determine the right of way at an intersection. Sometimes stop signs are also necessary due to physical obstructions.
Using stop signs to control speeding, however, is ineffective because traffic will only slow or stop in the immediate vicinity of the stop sign. Oftentimes, speeds are actually higher between intersections to make up for the time lost for stopping.