Limited visibility is a factor which all motorists deal with, and blind spots exist with most vehicles. However, due in part to the sheer size of a commercial truck, the hazard of the blind spot is particularly pronounced with tractor trailers.
When turning right, the length of these trucks requires the driver to actually swing the vehicle out to the left in order to initiate a proper turn. Further, to guarantee clearance of obstacles on the right side of the truck, the driver may also be required to pull past the origin point of the intersection in order to complete his/her right hand turn. The mechanics of this process and the limited visibility for the driver creates a hazard for motorists, pedestrians and cyclists alike. Understanding what the truck will have to do is often the best way to avoid an accident. So stay alert and refrain from crowding a truck when you are at an intersection.
While driving along the roads behind a commercial truck, pay particular attention to the mirrors. The rear corners of a tractor trailer and the space immediately behind the truck are blind spots. Truckers have an obligation not to drive their rigs into a space which they cannot see. However, they cannot control the actions of the drivers around them. So be proactive and protect yourself. A good rule of thumb is to remember that if you cannot see the trucks mirrors, the driver probably cannot see you! Try to make certain you remain where you can be seen!