Many people get confused on whether winter tire is mandatory in Metro Vancouver. If you also have this question, this article could provide you with a brief answer.
according to the BC government website https://www2.gov.bc.ca/gov/content/transportation/driving-and-cycling/traveller-information/seasonal/winter-driving/winter-tire-and-chain-up-routes
Highways not designated as winter tire or chain routes:
Vancouver, Richmond, Delta, Burnaby, Coquitlam, Surrey, White Rock, Langley, Abbotsford, and Chilliwack have a mild temperature, and therefore, highways inside these cities are not designated to install winter tires.
Most highways on the east coast of Victoria Island are not required to have winter tires installed.
Highways designated as winter tire or chain routes:
Highway 99 from Horseshoe Bay going to Whisler require vehicles to install winter tires from Oct 1st until Mar 31st
Highway 1 and 9 from Laidlaw/Hope going to the east require vehicles to install winter tires from Oct 1st until Mar 31st
Almost all the other highways in the eastern and northern interior region have required vehicles to install winter tires since Oct 1st.
If you see these signs on the highway, winter tires or carries chains are mandatory on the road beyond this point.
Private roads such as ski hills may have their own rule on using winter tires, chains, or traction devices.
For recreational vehicles such as fifth wheels and trailers, these vehicles should have winter tires "on the drive axle of the primary vehicle and chains and chains on board for the trailer tires" [https://www2.gov.bc.ca/gov/content/transportation/driving-and-cycling/traveller-information/seasonal/winter-driving/recreational-vehicles].