What that article is not telling you is that he was trying to cross the tracks where they were closed for Sailfest. There was a detour to go around Sailfest to get to the ferry.
The old guy came up to the detour, got confused, tried to inch into the crowd like they must have all been there by coincidence (maybe they were just a big group), he bumped into one person, got confused, stepped on the gas instead of the brake and hit 27 people.
He's probably driven this route 1,000 times but he came across a group of people he had never encountered and his cognitive skills couldn't process the change. The only thing he could process was "continue on my route like a robot".
He was being held at the hospital overnight and treated for "confusion" according to the local news.
Thankfully, nobody was killed.
Confusion? I wonder if it was dementia? In any case, I hope he has to be cleared by a doc before getting back behind the wheel.