Some things you need to identify and understand: lane markings, police officers, temporary road signs, construction workers guiding traffic, traffic lights, som

Some things you need to identify and understand: lane markings, police officers, temporary road signs, construction workers guiding traffic, traffic lights, someone waiting at the "yield to pedestrians" crosswalk, emergency response vehicles, ice patches. Just "not running into things" isn't enough to drive on roads. Really you should be trying to understand every vehicle since a naive approach of just extrapolating their velocity is insufficiently cautious since it doesn't account for future acceleration which can cause a crash.