thrombotic thrombocytopenic purpura. Description. Thrombotic thrombocytopenic purpura is a rare disorder that causes blood clots (thrombi) to form in small blood vessels throughout the body. These clots can cause serious medical problems if they block vessels and restrict blood flow to organs such as the brain, kidneys, and heart.
âTHE MOST IMPORTANT DRIVING TECHNIQUE TO AVOID CRASHES WHEN DRIVING IN ICY OR SNOWY CONDITIONS IS REDUCING SPEED AND INCREASING FOLLOWING DISTANCEâ. When you are driving on ice, you have to keep in mind that your wheels don't have as much traction as they do when you are driving on dry pavement.
Driving in fog is another situation when an extra effort is needed to ensure other drivers see you. Remember to use low beams in fog or heavy snow. The use of high beams under these conditions results in what is called white-out. White-out is created when the high beams reflect off the fog or snow. It is nearly impossible to see when there is a blanket of white reflection in front of you. Dawn and dusk are also times when headlights are critical. At dawn, some drivers turn their headlights off at the first sign of sunlight.