Was something like 20 years since I was in India, but IIRC at least back then they didn't have a "priority to the right" traffic rule, but rather some kind of "the one who first honks has priority". Traveling in a taxi felt suicidal, drivers just honked when approaching an intersection and continued blithely.
Based on a quick googling, this seems to no more be the case, and there is a 'priority to the right" rule.
Based on a quick googling, this seems to no more be the case, and there is a 'priority to the right" rule.