AVOCA, Iowa (KMTV) — Highway 59 runs right through the middle of a residential neighborhood in Avoca and the traffic can be loud for neighbors. That's why the city is installing cameras to enforce its noise ordinances.

Watch Katrina's Story Here Iowa Town Uses Noise Cameras to Catch Loud Trucks Breaking Sound Ordinance

Avoca City Administrator Tyler Trout says the noise ordinance requires vehicle sound to be under 83 decibels, but enforcing it has been difficult. One of the biggest offenders? Truck drivers using diesel engine compression brakes instead of conventional, friction brakes.

Trout showed KMTV an example caught by the city's cameras, in which the sound reached 106 decibels.

He says a city council member wanted to enforce the ordinance, so he went looking for something like

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