I've used a satelite phot (cheers google earth) to show the road layout, and I've marked on the 2 vehicles involved in a crash.
Vehicle A is coming down a sloped road, which was covered in ice and snow, and B had just turned off a main road, across the road A was driving on in an attempt to either go down the smaller side road or do a u-turn, the vehicles are marked in the positions just before impact.
Who is to blame?