Duluth, MN (NNCNOW.com) --- The city of Duluth is urging caution as freezing rain is causing slippery conditions across the region. Road crews have been out since 2:30 AM salting and sanding city roads. The main roads are in good condition, but some secondary and back roads remain slick. St. Louis County Public Works is recommending no travel on gravel roads in the County as a result of the current rain/ice storm. Snow-packed conditions of gravel roads cause them to freeze more readily, and all gravel roads in the County at this time are hazardous to travel. The main roads are in good condition, but some secondary and back roads remain slick. Ice storm warnings are still in effect for Itasca, Cass and Koochiching counties until noon today. The rest of the area is still under a freezing rain advisory until noon. Sidewalks, driveways and parking lots are being reported as very icy and dangerous conditions. City officials are urging people to demonstrate caution when walking on these surfaces if you must go out today. Crews are continuing to work on city streets throughout the day. Road conditions will likely improve after the lunch hour today. Many Northland schools and child-care providers are closed for the day. Click here for a complete list of weather related closings. Written and posted to the web by Raeanna Marnati