RCMP, Commercial Vehicle Safety and Enforcement (CVSE), and other policing agencies can prevent you from travelling and issue fines for not complying with signs and regulations that require you to properly equip your vehicle for road conditions.
Fines
Offence Act - Schedule 3 - Fines
Drivers must obey winter tire and chain signs throughout the province from October 1 to April 30. For select highways not located through mountain passes and/or high snowfall areas, tire and chain requirements end March 31.
The RCMP may turn all vehicles away if they think conditions are unsafe. DriveBC is an excellent source for highway conditions and weather forecasts.
The B.C. Commercial Vehicle Safety and Enforcement program promotes compliance with safety regulations with the commercial transport sector. You will see them at road checks, patrolling B.C. highways and at weigh scale stations across the province year-round.
In winter, their focus is to ensure commercial vehicles comply with all safety regulations, especially the use of chains or traction devices. They may also issue tickets to private car, truck and motorcycle drivers.
B.C. cities, municipalities and private roads (such as ski hills) may have their own bylaws or rules around the use of winter tires, chains or traction devices that may differ from provincial highway regulations.