Illustrative of how dicked-up traffic is in the NoVA suburbs of DC:
Today is the last day at this job for a frequent co-worker of mine. Originally, they were going to have a going-away lunch for him. They rescheduled to a 15:00-17:00 after-work event. I got into work ass-early, today, expecting to leave for the day in time for the original lunch-window. Instead, I ended up coming home - figuring that, since the event-site is four miles from my house, I'd just drive back.
Unfortunately, that four miles is constrained by a bridge from NoVA to MD. Waze was showing red all over the damned place, already, with a projected drive time of forty minutes. I got to my route decision-point - the ramp onto the highway that crosses the river - and opted to turn-back. Traffic from the highway was backed up past the ramp and through the next-closest traffic light. No go.
Called my friend up to convey my regrets.