Living in Orillia, ON I am a Highway 11 central Ontario snow belt daily commuter. Sudden and unpredictable snow squalls and whiteouts are the norm for a day where motorists in other areas are driving under sunny, clear skies. Cruising beside all the SUV's and 4x4 trucks, my daily ride is a 4cyl FWD Nissan Altima. New winter tires every 3 years are the trick for me, I can't even describe the difference that they make compared to those driving on so called all-season tires. I even have new Hankooks on my wife's AWD Ford Edge and both my sons drive with winter tires.
Most vehicles can become at least a "better" winter highway car with an investment in good winter tires. The key word is "good" winter tires, don't cheap out on something that may save your life. As someone who has commuted daily on winter highways for 13 years, my other advice is be very selective with your tire choice depending on your routine driving. I once bought a set of the latest, number one brand Ice tire only to discover that they were as useless as all season tires for someone driving routinely in deep or slushy snow. Ice rated tires are great for city dwellers, but in the snow belt, select a tire that is rated primarily for snow.