The Missouri Department of Transportation has purchased two L-RADs, which are designed to give loud ear-splitting warnings to drivers entering a work zone.

And, they’re pretty excited about this new technology.
They Kansas City MODOT office tweeted about it last week.


The LRAD systems weigh from 15 to 320 pounds (6.8 to 145.1 kg) and can emit sound in a 30° beam at 2.5 kHz.

The loud sound can penetrate even a well-insulated vehicle with its radio on.

Jalopnik has more:

The Missouri DoT plans to blast a high-pitched siren, very loudly, along with warnings to “slow down” to drivers.

The LRAD first came to prominence over the last decade, as it was found to be a non-lethal cureall for riotous crowd control, and also pirate defense. Point an LRAD at someone who finds whatever you’re doing disagreeable, fire the sucker up, and suddenly they are blasted with up to 153 decibels of noise.P

And how loud is 153 decibels? Well, lets put it this way: a standard-issue firework, if there is such a thing, exploding three feet away from you is slightly quieter. A Boeing 747 taking off right next to your head is much quieter.

 

 

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