Yeah, the issue is most of these bridges are in a pretty close vicinity, not much help for someone going from Virginia to Maryland. I guess what I meant was there aren't any bike lanes that cross the river outside DC, you usually have to go pretty close to DC to eventually cross

Personally, I go from Tysons Corner to Rockville, so instead of being able to take a trail along the 495 bridge (there is none), I have to go south, cross over at the chain bridge, then go back north

Edit: and then bike about 7 miles on Rockville pike