Well, sort of. The Virginia statute in question prohibits "interception of police communications" and was targeted at scanners, in an era when burglars and robbers used scanners to inform them if the police were on the way to their location. To then say that radar waves were "police communications" seems more than a bit of a stretch to me, but that's what the VA supreme court said in upholding a lower court ruling.
While I may be mistaken on this part, I think it boils down to that the "use of" radar detectors" is illegal, but not the mere possession of said devices. I think.
All this is based on a conversation several decades ago with a couple of VA police officers at a convention in Florida. In the lounge. And yes alcohol was involved.
When I lived there (this was in the late 80s) the newspapers were full of stories about how unmarked cars would come up behind a pack of civilians and pulse their radar. Anyone who hit their brake pedal was immediately obvious from the brake lights, and they would be pulled over.
Are Radar Detectors Legal in Virginia?
Police Radar Detectors in Virginia