MUTCD/Michigan
The Michigan Manual on Uniform Traffic Control Devices (MMUTCD) is the standard for road signs, signals, and markings in the U.S. state of Michigan. It is developed by the Michigan Department of Transportation (MDOT) "in substantial conformance to" the national MUTCD developed by the Federal Highway Administration.
Usage in OpenStreetMap
A traffic sign specific to the MMUTCD is mapped as a 
node tagged traffic_sign=US:MI:Z1-2, where "US:MI" is the state's ISO 3166 code and Z1-2 is the sign's alphanumeric designation. Unlike some other state editions, the MMUTCD codifies state-specific signs using the same format as the national MUTCD, without a unique prefix or suffix, so the "US:MI" namespace is important for avoiding misinterpretation.
Signs by series
- Main article: MUTCD#Signs by series
The following pages contain a correspondence between MMUTCD-specific signs and their most likely tagging in OpenStreetMap:
- Series D – Directional Signs
- Series E – Exit Signs
- Series G – Work Zone
- Series I – Information Signs
- Series M – Marker Signs
- Series R – Regulatory Signs
- Series S – School Area Signs
- Series W – Warning Signs
including:
- Work Zone
- Work Zone
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