I'm a member of the Kalamazoo Bike Club. Our club was instrumental in getting this law passed. Having 9 of our friends get hit, and having 5 of them killed, made this a club priority. We tried to get the state to approve a 5 foot clearance but had to settle for 3.
Some local jurisdictions have passed a 5 foot law and some would approve only a 3 foot. I feel that this law has improved things on this side of the state. Yes, I have been buzzed recently on a ride, so there are still knuckleheads out here, as well.
Our club purchased "5 Feet" signs and have given many of them away. Numerous club members and their families have installed them in their front yards. Also, our local government have installed numerous roadside signs.