Road Condition Update : Nan province
May 2016 :Route 101, the 18 km south of Tha Wang Pha. They are still working on expanding the road and removing some hills. This will probably take another few months to finish. This includes 2 small bridges and the bridge over the Nan River. But they are working about 20hr a day. I would not recommend to drive / ride here at night as there are some dangerous and unclear parts in it. For more information about the beautiful Nan province in North Thailand see Destination Travel Guide Nan - Thailand.
May 2016 : Route 1169, a 10 km stretch about 5 km north of Nan city. Here they are also still working on expanding the road. No dangerous situation, just gravel.