Tell me how the BIG bus going to turn when reach junction. The bus at least 3 times longer than normal bus that mean about 40m( about 10 normal sedan car length) long show in the photo.
The buses are following a fixed route. You can see the rail making by the side too.
You dont need to design a turning at all, it meant for long distance hauls. China is very big, a trip between towns takes hours.
It is obvious of the purpose of the buses.