It shows up in other places as well, The Netherlands has a lot of traffic islands at crossings, they often have a metal "fence" on it around schools to force ki

It shows up in other places as well, The Netherlands has a lot of traffic islands at crossings, they often have a metal "fence" on it around schools to force kids on bikes to zig-zag (slowing them down instead of crossing at speed). It's very manufacturer dependent how these are handled. The systems I have experience with are Volvo, Tesla and BMW and they handle things quite differently. My girlfriend's Volvo was very trigger happy on the emergency brake feature, it would hit the brakes for traffic islands all the time because it didn't know you were going to steer around it. It nearly caused us to be rear-ended at 50 km/h a couple of times. My BMW and previous Tesla on the other hand almost completely ignore stationary road-side kind of objects. Both have never braked for a traffic island in the few years that I drove them. The downside is I guess that there are known cases of Tesla Autopilot driving into things (the famous lane-divider incident comes to mind). BMW doesn't sell their system as autopilot, but their manual also has a big warning to be aware of things blocking the road and not to rely on the car to stop for those. So I expect their system, faced with that same lane-divider would probably also crash into it.