Yes, I probably did not phrase it properly as you are driving the roads even more to the east as I mentioned in my message. The dirt roads are in between the reservoir and the road you are riding - see the pictures from Graham Rogers.
Well, the roads do not need to be wide but having some "swerving" space can be useful. I remember about 2 years riding in Laos on a dirt road in one of the National parks - good road so was speeding a bit as there was no other traffic (I thought). Suddenly from the other side the park rangers appeared also in a 4WD - thinking the same as me. Luckily the road was wide enough at that point but our side mirrors touched and wrecked mine so it was a close call.
Well, the roads do not need to be wide but having some "swerving" space can be useful. I remember about 2 years riding in Laos on a dirt road in one of the National parks - good road so was speeding a bit as there was no other traffic (I thought). Suddenly from the other side the park rangers appeared also in a 4WD - thinking the same as me. Luckily the road was wide enough at that point but our side mirrors touched and wrecked mine so it was a close call.