How do we get dad's drivers license revoked because of dangerous driving?

Thank you MsMadge; this one is a real control freak, tho he usually will do anything a doctor says.... I think his sons are going to try that.

The easiest way is to have his doctor file a report with the DMV
Alternatively, you can write DMV too but
Having a license revoked is the easy part

You'll need to figure out how to keep dad away from the car if not sold and from tearing the house apart looking for the keys

Mom was able to pass the test to renew her license at age 88 but when I took the keys away it was practically WWIII and she wasn't even really driving anyway - it was just the loss of control she fought against