Suspect I have driven the TOW 20 or 30 times over the last 54 years I have been driving to/from Alaska, most years I don't see any tow trucks. The most I have ever seen, that I remember was 2. One was road service out of Tok for a flat tire and the other for an RV that got stuck because of a soft shoulder.
One summer there were two vehicle accidents, one a west bound RV, for some reason, the driver pulled out of his lane, crossed the opposing lane and drove off the road down an embankment into some willow trees. No injuries, but his wife was following in their toad and had a real scare watching their motorhome go over the edge.
The other accident was the US Customs agent that was west bound, ran off the road into a flooded creek and was killed.never did see a final report on what the investigation determined to cause the accident.
Overal, the TOP is not much different than any other gravel/dirt road in the US or Canada. People that learned to drive in the rural areas on gravel will think it to be an OK road. Those that learned to drive on multi lane pavement will claim it is the worst road ever. I have talked to people that told me the TOP/TOW is/was their first gravel road driving experience.
Folks that learned to drive around Badwater Texas, will have different thoughts than those that learned to drive in LA or Vancouver.