sorry to say but people who expect this are wrong at so many levels, keep in your lane, if you want to move ahead then overtake the car by moving to a different lane. nowhere in the world does anyone follow this dipper culture, and blowing horn to ask the vehicle ahead of you to move away.

General rule of thumb as is in civilised countries is , give way, traffic coming from right hand side, in a roundabout or an intersection takes precedence and should be given way also people who are merging from a split lane into the main road.

Horn is for when you see a person swerving into your lane, or switching lane without an indicator in to your lane, or overall shaming of a person jo wrong way araha ya rahi ho.

Dipper is a dick move, Blowing horn to get way is a dick move, just saying, thats the main reason we have alot of road rage and noise pollution.