I’ve lived in Virginia since 1974 and I’ve never found speed enforcement here to be anywhere near as draconian on a statewide basis as the stereotype suggests. Sure, there are a few speedtrap areas you have to know about and avoid, but for the most part if you don’t drive like a dumbarse or speed in an unreasonable manner (such as weaving in and out across all lanes trying to force everyone else to go faster), usually you won’t have a problem. School zones, of course, are an exception.
The bigger issue with speed limit enforcement in the Commonwealth is
not the Virginia State Police, unless you are driving 80 MPH or better.
It's the small and smallish counties and municipalities that engage in aggressive speed limit enforcement (in some cases it's because the police have little else to do, in other cases, it's is a craven and IMO corrupt way to raise revenue).
In Northern Virginia, that means places like the City of Falls Church, and the Towns of Haymarket and Leesburg. There are other places like that around Virginia too (the Hopewell speed trap on I-295 and the Town of Newsoms in Southampton County are two examples).
Falls Church is a small and wealthy place, and the cops do not have much else going on, but I do not think the city needs the revenue.
Hopewell and Newsoms IMO qualify for being classified as corrupt.
Then there's the matter of VA-286 (Fairfax County Parkway) in Fairfax County (duh). I have seen the Fairfax County Police doing a lot of speed limit enforcement on that road, but I think this is an area and a road where that's justified. Far too many drivers treat it as a freeway (and want to drive 70 or 80 MPH, speeds for which it was never engineered). This is a case where that speed limit enforcement is about safety, and about protecting idiots from themselves.