Can someone drive on Black Bear Road during the winter?

Black Bear Road is open a few months of the year, from late summer (usually the last week of July) to early fall. The road is traveled only downhill from Red Mountain Pass — except for the annual Jeeper's Jamboree in which travel is reversed for one day only. The start of the trail was formerly marked along U.S. 550 with a sign that read:

No, it is only open from late summer to early fall.