In Western Canada DriveAble, a private concern, is often used to assess medical fitness of seniors.
If you don't score well enough on their glorified computer game, you can lose your driver license without a road test
DriveAble's methodology is proprietary and has never been published in a peer reviewed journal.
I'm more than happy to see my AME. When the time comes, I'll cheerfully pay whatever extra for him to fill out the Driver form.