Winter DrivingRapid changes in elevation and weather can make highway conditions in B.C. unpredictable during the winter. Most B.C. highways have high mountain passes where you are likely to encounter winter weather starting in October. You may start a trip in sunshine but face stretches of slush, ice, heavy snowfall, compact snow or avalanches along the way. It is the responsibility of the operator of any vehicle to understand the conditions on the roads they regularly drive and equip their vehicle for those conditions to ensure their own safety and the safety of others. DriveBC is an excellent source for highway conditions and weather forecasts.