Crimes: intoxication or impairment; intoxicating substance list for operating while intoxicated; modify to include marihuana. Amends sec. 625 of 1949 PA 300 (MCL 257.625).

This bill amends Michigan's vehicle code to explicitly include marijuana as an intoxicating substance in the state's list of drugs that can lead to charges for operating a vehicle while impaired. The legislation directly affects all drivers and vehicle owners by clarifying that being under the influence of marijuana, alongside alcohol or other controlled substances, constitutes a violation of the law. It maintains existing blood alcohol concentration limits for adults while ensuring that visible impairment caused by marijuana use is treated as a criminal offense. By updating the statutory language, the bill ensures that law enforcement and courts have clear authority to prosecute drivers who operate vehicles while affected by marijuana.