But, unfortunately what I have observed in 8 out of 10 cases that people whose vehicles are ahead of them are failing to clear a path out for ambulance. Reasons and solutions are quite simple.
1) Those who are privileged enough to have four wheelers with windows closed and A/C running with a sweet melody playing often turns a deaf ear to this situation as if something very ordinary is happening outside.
It is not their fault, it is just their lack of maturity. They are blessed but don't know responsibilities they carry with these blessings.So, If you are blessed like this please keep an eye on your back and side mirrors to have an idea if you see an ambulance trying to make its way. If you start shifting lane believe me that vehicles besides you will start doing the same.
2) Those who are riding on bikes often thinks that they are on such a small thing and they also don't need to move to other lane. Don't make this assumption, because I have seen other bikers to make this assumption and collectively many bikes create a congestion point. So, Realize the situation and get aside.
3) Those who are driving long vehicles like buses, trucks, etc. I know they don't get a chance to read this writing or hardly anyone reading this blog can see such a driver in person and tell him what I have observed :)
So, for them I have seen some people doing the trick so car drivers and bikers can do the same. I have seen bikers coming beside to buses and shouting to get aside because of ambulance. I have seen cars blocking their way to clear out a path for ambulance.
4) Don't be so smart to run behind an ambulance and taking advantage of a clear lane. Since you rarely see ahead of a Suzuki Bolan/Hiace(ambulances) and if they shift lane you will be hitting in some one's vehicle.
Sometimes when I travel in a Taxi and driver is not concerned about the ambulance coming behind it I ask him to please shift lane or at least try to shift. Sometimes I got the answer "bhai yeh jan bojh k bhi aisay kartay hain ya pher itna jam hai kahan jaaon ya yeh tou gorment/traffic police ka kam hai".
Imagine yourself lying in that ambulance. Do whatever you can, don't start justifying or throwing ball in other people courts. We have enough of it as a nation, there are certain things which we can do. So, act immediately and give way to ambulances.
Be a responsible driver.