I use this road as a regular short cut between the 201 and the 203, avoiding Loei if I am travelling to or from Nan. It saves a lot of Km, but does have the disadvantage that it misses the most enjoyable part of the 203 going into Loei.
Forgive me being pedantic, but the 3002 starts about 17km East of Phu Ruea, it is a great road thro lovely varied scenery and not much traffic.
The road does have some unexpected twists and turns, there is a very sharp LH bend only a few km after leaving the 203, but I guess the Dead bend is a bit further on and is well signposted, even a hump to slow you down before reaching it, it is two sharp bends dropping downhill. From the nasty gouges in the road, one can see that there has been trouble, but never seen any police around there.
The 3002 merges with the 2140 heading into the centre of Wang Saphung.