With the winter storm approaching, road crews around the region are gearing up for trying to keep roads clear.  Priorities for road plowing are essentially the same throughout the region, starting with high traffic volume roads and school bus routes, followed by remaining paved roads, then subdivision, cul-de-sac, and outlying dwellings on gravel roads.  The Oregon Department of Transportation says crews have started working 12-hour, round the clock shifts.   On Tuesday and Wednesday, crews were spreading de-icer, magnesium chloride with rust inhibitor, on area roads with plows and sanding trucks on standby for use as needed.  ODOT adds it will closely monitor Interstate 84 through the Gorge, and would close the freeway if conditions become unsafe.  Nighttime warming shelters will be available in the region, with The Dalles Warming Place at St. Vincent dePaul on 315 West 3rd from 7 p.m. to 7 a.m., and the Hood River Warming Shelter at Hood River Valley Christian Church on 975 Indian Creek Road from 6 p.m. to 7 a.m.