Lorry with heavy white smoke

While driving to Kuantan Damansara, I met this incident, which created potential major traffic accident. I cannot saw even the end of engine bonnet and navigated by assuming that line is straight. The lorry produced very heavy white smoke, and most of the car travelling more than 70kmh. Based on internet it happened due to;

"White smoke is normally ‘steam’ which means water is vapourising! If it is white ‘smoke’ then it could be as a result of low engine temperature. White Smoke will smell of unburned diesel - White ‘Steam’ will not!"

In this case, we've smell the unburned diesel. Luckily no accident happened.