Two types of blockage

 It is a bit hard to see but there is a a piece of bamboo growing all the way across this road. Apparently this used to be the main road along the riverside, but new straighter streets have been built. Now it is only about a hundred meters long and is a curve that connects the two newer roads. I suspect that no cars use this part of the road since it is in about the middle. The drivers would probably exit at the end of the road nearest their house, leaving this section unused. In any case it would not damage the car if the driver just drove right through.

Here is a second blockage. This moveable dam is in the up position creating a body of water behind it. We have had a fair amount of rain so who ever controls the river is releasing the water slowly by damming at various places.