Quite a lot of cars have lane assist now, where they will have a light on the wing mirror if there is something in your blind spot. They also vibrate the wheel

Quite a lot of cars have lane assist now, where they will have a light on the wing mirror if there is something in your blind spot. They also vibrate the wheel if you go over lanes and aid in steering your back. I imagine this is a combination of the two. My worry is how it deals with something like this http://www.op-online.de/bilder/2012/12/18/2669673/1360212316-baustelle_autobahn_dpa-1609.jpg http://www.op-online.de/bilder/2012/12/18/2669673/1360212316... Does it just stop?