Roads are constructed according to need. Some of them are must should and need of transport. So people need to travel through it even how the situation is. There are many roads which are not so good to travel but there is no other means of transport and need to travel through it. Have not you traveled through this kind of roads previously. You might or might not traveled by this roads but have a look at the video so that you can get an idea how the roads would be.
We need to thank engineers those who planed and constructed this roads even in that conditions. It is not so easy to construct the roads of this kind in such position. You can see in the video that the roads are constructed beside the water seas, river and in other positions.