When sheep are transported in trucks they are crammed in to stop them from falling over. Although this does help to stabilize them it is common for trucks to contain downed sheep who are unable to get up and who are being trampled by others. It is illegal to transport pregnant ewes but it is not uncommon for lambs to be born on trucks. A common sight on busy freeways is for a transport truck to be seen with the head or limbs of sheep protruding from the side of the truck. It is illegal to drive with any part of a sheep protruding from a truck. It is very difficult, however, for a driver to stop and rectify the situation during the journey without unloading all the sheep. This law is in place more for appearance than for practicality. Accidents involving sheep on trucks is becoming increasingly common resulting horrific injuries and deaths of these animals.