Wow! We towed our TT across the TOW last summer after three days of rain and had no problems. The day before a Class A had gotten stuck at a construction site but the road workers pulled him out. We heard nothing about any rig going over the "side" last year or at any other time. Are you sure this information is correct? We thought it was a beautiful drive and as we were not in a hurry, the time did not bother us. It is difficult to see much in the Yukon or Alaska without driving on narrow roads from time to time. We found other drivers, even the haul trucks, to be courteous and we never had any situation where we felt endangered. Of course, in the North Carolina mountains, six inches of clearance is considered adequate so we are accustomed to that. I am sorry this was a bad experience for you but urge others who are considering the TOW to read other posts and get other opinions. lizzie