Wouldn't you have to make sure the driveway can dry out before the night? If it stays wet and then the temperature dips below zero at night, that would not be a good combination (unless you keep the pump running full time to keep supplying above zero ground water).
Like I say it rarely goes below freezing and as it is usually snowing constantly the sprinklers pretty much stay on.
Niigata's snow clearance policy is based on sprinkler networks and snow ploughing.
The pipes aren't everywhere so some roads and even sections of road rely only on snow ploughs.
Only on a cloudless night do they have to put salt down, which is rare.