British Columbia is now requiring drivers who have been outside of Canada at any time in the past 14 days prior to entry to file a self-isolation plan each time they enter the province. The plan must be filled out whether the driver is entering from the international border directly into BC, or have entered Canada by way of another province.
Commercial drivers and essential service workers must create and file a self-isolation plan but are only expected to implement the plan if they begin to to show symptoms.
More on this requirement at the Canadian Trucking Alliance website.