Blind spots around large vehicles, such as truck, are much larger than passenger vehicles. these large blind spots are called

No zones

Explanation:

No-zone is defined as the zone or area near the huge vehicle such as truck,bus etc.This zone is avoided by the drivers of the smaller vehicles such as car , bike etc because if they enter this zone then their vehicles behave as blind spots for large vehicles.

Chances of having collision or accident become high if the smaller vehicle is in no-zone of heavier commercial vehicle because drivers of these vehicle are not able to control or stop vehicle from accident usually.

what's this it's not giving you what have to do.

the answer would be in this answer. someone already asked the question.