Legalizing recreational marijuana

A bill may be in the offering to legalize recreational marijuana by one of our Michigan state legislators.  He says it will bring in big revenue.  What he neglects to say, is at how much cost?  Explain this 'big revenue' to all those who have had their cars totalled and loved one killed by drivers 'under the influence'.  Using marijuana will affect one's driving ability, as does alcohol.  Don't kid yourself.  I believe the 'cost' far outweighs any revenue.  We don't need to legalize another 'drug and drive'....................marge