Indian road rules broadly operate within the domain of karma where you do your best and leave the results to your insurance company.

The hints are as follows:

Do we drive on the left or right of the road? The answer is “both”. Basically you start on the left of the road, unless it is occupied. In that case, go to the right, unless that is also occupied. Then proceed
http://sugiero.blogspot.com/2006/04/video-driving-indian-style.html

There ARE accidents (I’ve lived in India and Vietnam, and seen many). Usually they’re low-injury due to the speeds, but most people don’t wear helmets, so even low-speed crashes can be dangerous. That said, it’s like being a pebble in a stream. The traffic flows like water around the obstacle. Usually.

Try riding a motorcycle in traffic like this. Situational awareness becomes second nature quite quickly

Notice the non motorized vehicles on the road.
These roads were made for bicycles and other nonmotorized vehicles to begin with. The rules haven’t changed with the addition of motorized vehicles.

It seems to me as, buses have right of way. Built of mass of vehicles have right of way. It’s not just plain bigger cars have right of way.

From the 2 weeks I was there on business and traveled to 3 different areas. The rules I found were simple. Just honk and pass. Of course, everyone wants to pass. It gets really interesting when the cows start to move around. Seriously.