You need to anonymously report him to the DMV for further testing. It's a shame the DMV isnt doing their jobs. We all should be reporting the elderly drivers going extremely slow and holding up traffic (of course they never pull over). The DMV should be encouraging everyone who sees it, to report it. It is ashame that the kids of elderly are affraid to take control and take away the keys. Maybe going as far to disable the vehicle to save their loved one or others. I hate to think that they really do nothing because it could hamper their inheritance...But I do think that!