Normal/Seasonal:  The roadway surface is normal/dry up to and including rain, sleet, snow, or a mixture causing roadways to become partially covered. The driver may experience periods when the roadway markings may be obscured. This represents an advanced deterioration of the surface. The roadway may become difficult to navigate.

Difficult:  The roadway is completely covered with precipitation. Accumulation is to the point that the roadway markings are completely obscured, making it difficult to differentiate between the roadway and its surroundings. These conditions make travel very difficult.

Hazardous:  Some weather conditions can be severe enough that roadway treatments, such as salt or sand, will not work. Emergency vehicles and snow removal equipment may be called off of the roadway due to the conditions. Motorists are urged not to travel. While not a full Closure, it could quickly change to Closed. This condition could also warrant Travel Not Advised. Travel Not Advised must be authorized by a State Patrol Supervisor or a DOT District Engineer or higher.

CLOSED / Impassable:  Conditions are severe enough that it can create a life-threatening danger to motorists. By driving on a road that has been designated as closed, you are entering at your own risk. Emergency vehicles and snow removal equipment will most likely not be available to help you. It is against the law to drive past a road closure device on a closed road.