I was going to recommend a radar detector, but I see that you live in the Commonwealth of Virginia, so I know it's against the law there. I saved up cash like crazy and bought a Valentine 1 a few years back- Super expensive, but I wanted high-end quality, and while I had buyer's remorse right after I ordered because of the cost, I can say it has paid for itself MANY times over since I have a heavy foot. I drive a lot for work all around Florida/SE USA, so I figured it was worth it in time saved, and it has been for sure, but a high up front investment.
I use the waze myself, but the issue with those apps is that they depend on input from drivers to a large degree- Which is great if you're on a heavily traveled road like an interstate where there are a lot of drivers/users, but it sucks if you're off on some county road somewhere that has light traffic- Just the economy of scale, but you already know that... Haven't tried radarbot, but I may check it out as well..
Given the VA laws against RD, you're probably going to have to just do your best to follow the rules in traffic on the less traveled paths. Good luck!