Stop signs are not for slowing traffic. That's what the Manual Of Uniform Traffic Control Devices says. And, there are studies to back up the policy.
This review surveys over 70 technical papers on the use of stop signs to slow traffic and concludes, no surprise here, that stop signs are ineffective if the aim is slower cars.
- Twenty-two papers found that multi-way stops do not control speeds.
- Nineteen studies found that compliance is poor at unwarranted stops.
- Thirteen studies found that unwarranted stop signs decrease pedestrian safety.
- Unwarranted stop signs create more noise in the vicinity of the intersection
- Unwarranted multi-way stop signs create increase operating costs