While driving, we try to follow some basic rules. If we need to turn left, we move to the left lane or try to occupy the left most area on the road at least 50 meters before the turn. See the graphical representation of a road with lanes.
Even if lanes are not drawn on the road, it is easy to follow an imaginary lane.
Now see the photograph. All the lanes are occupied by MTC and private buses.
There is a left turn and right turn. The buses that occupy the left and right lanes are long distance MTC buses that need not take any turn. Imagine how it would be to drive a motorcycle or a car in this traffic.
Photograph taken in 100 ft. road near Olympia Tech Park (seen in the background)