A couple years back someone tacked this added message below the warning sign that really states the obvious. Be prepared when exploring Oregon during the winter months. And don't always rely on that GPS. Many forest roads, while beautiful alternatives from the main highways and freeways during the snow free months, are not maintained during the winter.
Travelers should be aware that even a few inches of snow can obscure icy roads and soft shoulders where vehicles can become stuck. Winter storms can trigger unexpected rock slides, and falling limbs and trees; they can quickly change driving conditions on forest roads from passable to impassable in a matter of minutes.
Keys to safe winter driving: Plan for the unexpected. Keep in mind that cell phones may not work in remote areas. Check the latest road and weather conditions at TripCheck.com or dial 511 before heading out. Always tell someone where you're going and stick to that plan. Carry an emergency kit in your vehicle. Travelers should be prepared to spend long periods of time in the car. Blankets or sleeping bags, warm clothes, a snow shovel, water, food and other necessities are recommended as part of a complete vehicle emergency kit. Always fuel up at the beginning of the trip.
Weather can change quickly, particularly in higher elevations. Good snow tires, a 4-wheel drive vehicle, and chains are advised or often required, when driving in winter conditions. As a general rule, always adjust your speed to current conditions and drive at speeds that allow you to stop in half of the visible road distance ahead of you.
Helpful information about planning a trip to a national forest during the winter months can be found on the Know Before You Go webpage at go.usa.gov/Cmq.
ODOT and the County Maintenance Crews do an amazing job keeping our Highways and Interstates passable. They plow, they de-ice and sand but it is our job to use a little common sense, stay on roads maintained during the winter months, and drive cautiously to make sure we reach our destination safely.