How come when the weather turns really bad, the authorities have no problem getting as many Police officers, and D.O.T to the bottom of every mountain pass, to make sure truckers chain up?

The only thing they can’t seem to do, is get a damn sand/plow truck out and plow and sand the darn hill.
How come they can’t get a snow/plow truck there, but have no problem with police, and DOT officers?
Wouldn’t it be more cost effective, to add more plow trucks, when the weather turns bad, then have the authorities baby sit every darn hill?
Is this privatization at it’s finest?
Note: Our highways departments went private, twenty plus years ago and highway maintenance has gone downhill ever since.