Winter tires in BC: what the law actually says
On signed highways in this province winter tires are not a suggestion. The rules are specific, and most summaries of them online are wrong.
Plenty of advice about winter tires stops at the useful but vague point that cold rubber grips worse. In BC there is an actual legal requirement on top of that, and it is worth knowing precisely rather than roughly.
The dates
On most designated routes the requirement runs from October 1 to April 30. On some designated highways that do not go through mountain passes or high snowfall areas it ends earlier, on March 31.
Studded tires are permitted on BC highways between October 1 and April 30.
Which roads
It applies to designated highways, and those are marked with roadside signs. The signs are the thing to watch for rather than a list to memorise, because the network is signed route by route.
Chains on summer tires are not an acceptable substitute for winter tires on a signed highway.
What makes a tire legal
Two markings are accepted. The three-peaked mountain and snowflake symbol, and the letters M and S for mud and snow, which covers most all-season tires and is the minimum legal requirement.
The tire also has to have at least 3.5 mm of tread depth. A tire with the right symbol and worn tread does not meet the requirement.
If you are choosing between the two markings rather than just meeting the minimum, the mountain snowflake tire is the one built for real winter conditions. M and S is the floor, not the recommendation.
What happens if you are not equipped
Drivers without the proper equipment can be turned around by police or commercial vehicle enforcement, and the fine is $109.
The practical cost is usually larger than the fine. Getting turned back on the Coquihalla in November because of a tread depth issue is an expensive afternoon.
A note on timing
Waiting for the first real snowfall to book a changeover is how people end up waiting days for an appointment. Everyone else has the same idea on the same morning.
Where to check
Sign requirements change by route and by season. The Province publishes the current rules and the designated routes, and that is the thing to check before a winter trip rather than any blog, including this one.
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