One day we were out sight seeing and wanted to go by the visitor's center for some information.
When we got there this sign was posted on the door.
Now I agree if it is unsafe to be out... don't drive 100% agreed.
The Road from the visitor's center.... obviously clear.
OH You Silly Southerners, cold outside does not mean "bad weather".
(This is posted in complete fun. Obviously only drive when you feel safe.
And it is a little frustrating for the northern tourist too.)