Wind and snow may cause hazardous travel conditions in the Columbia River Gorge and mountain passes this week.  The Oregon Department of Transportation says its maintenance crews will be ready with winter tools including plows, salt, de-icer and sand.  With various types of winter weather threats possible in Oregon, travelers need to be extra cautious on the roads in the days ahead.  Travelers should consult Tripcheck.com and check weather forecasts on their planned routes.  If you must travel in winter weather, be prepared.  Pack your vehicle with the essentials: tire chains, snacks, water, medications and warm clothing.  Fill up your vehicle’s fuel tank and fully charge its battery.  Plan your route ahead, and if you’re following GPS navigation, make sure it sticks to main roads because many rural roads are not maintained in severe weather and can be very treacherous.