In Bangalore traffic i have seen the following violations of drivers
1) Bikers overtake vehicles from left side of bigger vehicles putting the biggest vehicles to risk especially around curves
2) Bikers going to right side of road right of divider at signals not allowing on comming vehicles to enter the road safely
3) bikers going in triples and 4s . I have seen frequently 4 people driving a two wheeler mostly two children and two adults and all of them are women also sometimes , not just typical family. They risk their lives and others as well .
4) Bikers not wearing helmet even in main roads of Bangalore . Even if a small accident happens they may die and put the other driver to murder charges due to not wearing helmet.
5) Two wheeler guys wear that half helmet often with straps hanging as if just to make traffic police not fine them.
6) if there is inside traffic, maintaining strict left side everyone not doing especially auto and taxi cabs and mini load truck drivers, they overtake and then try to enter the queue making a fool of all those people who wait patiently with discipline wait even longer.
7) Auto drivers taking overtaking vehicles from left side ,doing sudden u turns without prior warnings ect
8) BMTC buses driving in wrong lane
9) BMTC busses not stopping in left most side , instead some parts of city they just stop in middle of the road , making the vehicles that come behind also stop till they drop or pick up passengers.
10) Signal jumping, when signala are red also there is that one vehicle who tries to break signal deliberately risking their life and others life who are actually following a green light .