this image is not available
Media Platforms Design Team

If it was good enough for the Duke boys, it's good enough for us.

Regardless of your feelings toward Jimmy Carter, I think we can all agree that his finest act as president was the creation of National CB Radio day. Carter designated October 4, 10/4, as a day to honor the citizens band, and to celebrate, we're giving you a chance to brush up on your APCO 10 codes.

READ MORE: 100 car gifs to rule them all

Some of them may surprise you. Everyone knows what "10-4" means ... but "10-40" could mean "run silent," "dead animal," or even "mental patient." The possibilities are fascinating. Here are 10 to get you started.

Code Meaning
10-11: could mean "animal problem," "talking too fast," or "en route." Or perhaps a fast-talking animal is headed your way.
10-13: request a report on weather conditions. If it looks bad out, this can net reports from ahead of you to keep you out of a bad situation.
10-34: there's a riot happening.
10-45: lots of diverse meanings, from refueling your rig to reporting a dead animal carcass. Could also signal a coffee break.
10-46: this means a motorist needs assistance.
10-69: either you got the message, or there's a sniper about. Make sure you know which one you're reporting.
10-80: whatever's happening, it's exciting. This call could be about a pursuit in progress, a bomb that exploded, or a demonstration of civil disobediance.
10-89: need to report a bomb threat? This is your APCO code.
10-94: somewhere, somebody's street racing.
10-98: if you hear this one, don't pick up any hitchhikers. There's been a prison escape.

Keep in mind, these aren't set in stone. They're just the most common usages from around the country. Read the rest of the list here.

READ MORE: Busted: Paying the price for ignoring the government shutdown

Originally published at Road & Track.

From: Road & Track
Headshot of Zach Bowman
Zach Bowman
Associate Editor
Zach Bowman is an editor with Road & Track. He splits his time between building Project Ugly Horse, an EcoBoost Fox Body Mustang, and hoping his ancient Cummins stays together. He's covered the automotive industry since 2007, and digs anything weird or built in a shed. Bonus points for weird things built in sheds.