#Hand signals while driving license
You would surely flunk the driving test for a license if you failed at these key signals (other than not bribing the cops of course! ) Another interesting signal, which by the way is still used heavily on the highways by the truckwalas, is the one denoting the slowing down ahead (waving your right hand slowing) and the one involving halting to a stop (hand held out like your taking an oath). The same applied to the cars as well when it came to turning(of course one could not jut out his left hand from the car for a left turn anyways :) ).
Instead, one was supposed to use the right hand and turn the hand(pointed down) anti clockwise at the wrist to denote a left turn. Since the gear and clutch mechanism is on the left side of the handle, you are expected to never take your left hand of the handle. The key signal where people failed usually was the one where you had to show a hand signal while turning left. The cop checked if I made the right hand signals. I still remember giving the driving test for my two wheeler license on my Dad's Bajaj Chetak(the quintessential family scooter). In this scenario, hand signals formed a very important part of driving. Among the cars, most of them were non A/C ( a) because using a/c was considered an unnecessary luxury back then b)pollution wasn't bad enough for ppl to roll up their windows and drive). None of these two wheelers had indicators built in and the few ones that had, were mostly never used. In the 90's, the roads were predominantly covered with Scooters(all bajaj and some lml vespa) mopeds(tvs 50 et al) and a few bikes(ind suzuki, tvs suzuki, hero honda) and the cars being mostly premier padmini or the maruti 800(other than the occasional contessa). The Indian driving style has transformed in the past 2 decades and thus have the signaling pattern.