This is a good place to insert one of my pet peeves. In Pennsylvania (and probably lots of other states), you are liable for any damage that occurs when snow or ice falls/blows/ or otherwise comes off the roof of the vehicle you are driving/towing. I recently followed a Schenider truck up Interstate 81 in our area for about 5 miles. It had about 18 inches of snow on the rear of the trailer and was losing it along the way. I kept my distance.
__________________
|