Michigan law prohibits all drivers from typing, sending, and reading text messages on two-way wireless electronic communications devices, including cell phones, while the vehicle is in motion (MI Comp. Laws Sec. 257.602b).
Drivers are allowed to send messages to report a medical emergency, traffic accident, serious road hazard, situation where personal safety is in jeopardy, or criminal or potentially criminal act.
The law does not apply to programming of global positioning systems or other navigation systems affixed to the vehicle.
Currently, the state does not have a law that prohibits the use of handheld cell phones while driving. However, it does permit localities to pass ordinances prohibiting their use.
Detroit. The city of Detroit prohibits use of handheld cell phones while driving within the city limits. Violation of the law is a secondary offense.