Noooo!!
Roads like the #1249 road Blackberry has in the first picture belongs to the motorbike for soooooo many reason. The reason I say that is the last time I drove by that sign was with a bunch of boy scouts in the truck headed to a camp out - and in those tight mountain corners it's pure pleasure on a motorbike, it's WORK and nausea inducing driving the truck safely. You don't need a van here, and at first I wanted one here, but the weather is just too comfortable all year round.
Blackberry drop me a note next time you land in Chiang Mai, if you don't mind Mexican food or a riding partner for a day or 2.
I can't place your second picture. Is it the road to the To Ban microwave, my first guess, off the 108 just south of Mae Hong Son? Or is it in the Chiang Dao national park?
FYI, just today a friend rode that area around Fang, the report is here -
http://www.captainslash.com/fang-wiang- ... thai_fang/