Sounds simple enough, but allow me to attest that not speeding here in NoVA is a good way to get squashed like a bug.
I know, I know. I used to live there. If you "go with the flow" you will end up going about 10-15 mph above the speed limit. I've driven in bumper-to-bumper traffic. I've driven in extremely fast traffic. But only on I-95 and I-495 have I driven in extremely fast bumper-to-bumper traffic inches (literally!) from each other at 80 (or more) mph.