Car reverse siren

[esadajr]

what do you think about these? do you think they're annoying / useful?

[VenomMacbeth]

Just sounds like your mom backing up.

[esteban]

what do you think about these? do you think they're annoying / useful?

They should be installed on shopping carts and strollers and lawn mowers and toddlers.

[bob]

And people standing in lines

[MrFlutterPie]

My car has one.  All it does is make people stop in front of you and look around confused thus increasing their likely hood of getting hit.  I wouldn't bother with personally.

I inherited my car from my grandfather and he had it installed.

[SuperDeadite]

Here in Japan all cars have them factory installed. After awhile you don't really hear them anymore.

[Tatsujin]

In Japan everything makes noises and blinks.