Sad and interesting. I rear ended a vehicle who turned into my lane, and the officer cited the other driver for an unsafe turn.<p>I guess it depends on officer mood and how long the car was safely in your lane before the breaking. Mostly officer mood.<p>Still, there are lots of completely legal sudden braking activities that would cause a collision over 10% of the time. People don&#x27;t actually drive totally defensively all the time.