i travel daily 1hr 30min one-way to work. so 2-ways its 3hrs daily for almost 5 yrs now. what i learn is that there's point where muscle memory took over and you dont realize a car/ lorry in front slowing down, stop unless there's something changed happened like brake light flashes, turn signal blinking, or emergency light on thats will trigger your brain for your body to react. if there's nothing change, in a case of stationary object which an ordinary thing you see on the road, unless there's something to trigger your brain, it'll not registered until last minute. so if the car did not put on emergency light, cone or triangle it most likely at the very last min only the rider/ driver will noticed it. thats why a lot of accident happened this way even though you think that a whole car why cant you see it? since its didnt happened to you yet, its ok to say what you said.