You're not supposed to drive faster than the speed limit. You're not supposed to text while driving, either.

Police already have equipment that detects how fast you're going, of course, but a Virginia company is now developing technology to monitor texting and driving from a distance.

Following the radar-gun model, a Virginia company is working on a similar device that can pick up the specific radio frequencies emitted by text messages, according to The Virginian Pilot.

So if you're guilty of texting and driving, you'll have more to worry about from parked cops than a speeding ticket.

ComSonics, the company developing the radar gun, told the Pilot that the radar gun is "close to production." The technology is sophisticated enough to differentiate the frequency transmissions that separate phone calls and texts.

There are some other questions raised by the radar gun. Say the driver is using voice-to-text technology to send hands-free messages. The device would presumably pick up those radio frequencies. Same goes for passengers. Could you get a ticket because a friend sent a text message?

It remains to be seen how soon these machines would be implemented into everyday use, or how widespread the radar guns could become. ComSonics believes the devices would not compromise drivers' personal information, as the devices are not designed to decrypt information transmitted by drivers.

There are already options available for texting-conscious drivers with apps like DriveScribe and AT&T's DriveMode that can monitor or disable texts in vehicles.