Strange problem with Garmin GPS (navigation system)

Same for DC. It’s a confusing road system even if you know where you are going. I used to remember a few main roads and drive in the right general direction until I got to one of them and then continued to my destination. GPS came in handy when I worked in SW DC and decided to get off the highway because of snarled traffic. I ended up using one of them as a go-to detour when traffic was a mess around the DC295 and I-495 intersection.