Traditional speed radar guns emit a wide radio frequency beam ... the speed of cars moving both away from and toward the ...

[Gregory Charvat] decided to see what he could do with this old Police radar gun. It is an X-band device that broadcasts continuous waves and measures the Doppler shift as they echo back.

But, a new sort of radar gun may have us quickly singing their praises. The Virginian-Pilot reports that there's a new tool that will be able to tell officers if a driver is texting rather than ...