With icy roads arriving, CAA recommends installing four winter tires for safety. Use the "7-for-7" rule: switch once temperatures stay below 7°C for 7 days. The specialized rubber in winter tires provides better traction on snow and ice than all-season tires. Subscribe to CTV News to watch more videos: https://www.youtube.com/ctvnews Connect with CTV News: For live updates and latest headlines visit: http://www.ctvnews.ca/ For breaking news, fast, download the CTV News App: https://www.ctvnews.