I installed 40 feet of electrically heated driveway. It's not the entire driveway, just two strips on a steep hill. Each strip about two feet wide. The strips are always clear of snow even in the worst storms. A moisture and temperature sensor turns it on when conditions are right.
It's not cheap to install and uses a lot of electricity, but it has been doing the job for more than ten years.
It could melt any thickness of snow, but the way it works is to melt it as it hits.
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