And is a marching band, the brass section can blare above the other instruments. 

From the Middle Dutch or Low German word blaren, meaning to roar or bellow. 

The slang meaning for blare is 'to crank up the volume really loudly'. 

The blare of car horns is often accompanied by the finger of disrespect. 🖕 🤬

2 minutes ago, JamesSavik said:

The blare of car horns is often accompanied by the finger of disrespect.

And sometimes a gunshot as well. 

1 minute ago, Bill W said:

And sometimes a gunshot as well. 

This depends on the road rager in question, the offense, and whether they're sober.