Mumbai best, Kolkata worst. Resident Alien's observation about Mumbai and Bangalore drivers makes me write this Article. I have been to all the India's metros a few times over last two years. Been in the dreaded Cabs and private cars as well. Based on experiences and observation, here it is, for the first time ever, Indian Metro traffic rankings Mumbai Chennai Delhi Bangalore Kolkata This order is based on the stress you feel while driving, and not just the average speeds or crowding levels. Stress, I would say, is more a funk of traffic sense drivers have, and then some other things like policing and general design of roads. Mumbai and Mumbaikars understands lanes a lot better than road-starved Bangalore or roads-aplenty Delhi. I can explain the difference Bangalore and Mumbai are mature Metros. The two cities have similar crowding levels. But Mumbai drivers have, by now, figured that lanes are here to help them make best use of road space. So, when you jam your brakes on a 4 or 6 lane road there, more often than not, the driver chasing you is going to stop right behind you. Mumbai is the Best and Kolkata is the worst in Traffic issues.I am a Mumbaikar and Love Mumbai very Much.