Hearse with sirens and beacon light spotted

From about a month I have been spotting a Muslim hearse van with a red beacon light and siren near wanadongri. Just to be clear I have no hate towards our muslim brothers, I am just intrested why does a hearse require a beacon light and siren, does it have a cultural significance or something? I am curious, I mean the person (may God bless their soul) is dead, what is the need of sirens in this case?