That's the first time I've had to use "Four Wheel Drive LOW" on a highway before . . . . . 
 
I came over the rise on the big hill south of Okotoks on the Dump Road this a.m. - going only about 50 km - and saw a tow truck straddling the highway at the bottom, pulling someone out of the ditch. I pretty much slid the half kilometre to the bottom of the hill. A pretty interesting tobogganing experience. 
 
 
 
Pure ice south of Calgary this a.m. and drizzling freezing rain.
 
Cowperson