Roads

Courtesy: Iowa Environmental Mesonet/Iowa State University of Science and Technology/Iowa State Patrol/Iowa Department of Transportation

 

  • Normal or Wet: Normal winter driving conditions exist. This includes dry and wet roadways, but any precipitation on the road is not freezing. A wet condition could result in reduced traction.
  • Partially Covered-Snow: Snow is causing the roadway to be partially covered (up to 50 percent). Drivers may experience periods when roadway markings are difficult to see. With continued precipitation, the roadway surface may become snow packed.
  • Partially Covered-IceA mix of ice, sleet, or a mix is causing the roadway to be partially covered (up to 50 percent). Drivers may experience periods when roadway markings are difficult to see. With continued precipitation, the roadway surface may become slick and rutted.
  • Mostly Covered-Snow: Snow is causing the roadway to be mostly covered (more than 50 percent). Drivers will likely experience periods when roadway markings are difficult to see. With continued precipitation, the roadway surface will likely become snow packed.
  • Mostly Covered-IceA mix of ice, sleet, or a mix is causing the roadway to be mostly covered (more than 50 percent). Drivers will likely experience periods when roadway markings are difficult to see. With continued precipitation, the roadway surface will likely become slick and rutted.
  • Completely covered-Snow: The roadway is completely covered with snow. Roadway markings are obscured making it difficult to differentiate between the roadway and its surroundings. These conditions can make travel difficult and hazardous.
  • Completely covered-Ice: The roadway is completely covered with ice, sleet, or a mixture. Roadway markings are obscured making it difficult to differentiate between the roadway and its surroundings. These conditions can make travel difficult and hazardous.
  • Travel not advised: The roadway has deteriorated to the point that it is very dangerous to travel. Emergency vehicles and snow removal equipment may be called off of the roadway due to the conditions. Some weather conditions can be severe enough that roadway treatments, such as salt or sand, are not effective. In the event of an emergency, it may be impossible to get emergency vehicles to the scene.
  • Impassable or closed: A road that is impassable is blocked by snow or vehicles. A road that is closed has travel restricted by barricades, fence, gate, equipment/vehicles or other physical means. Iowa law prohibits motorists from entering a closed roadway or moving traffic control devices.