Yeah, the sidewalks around TJ and East Basin Drive aren’t bad in the winter. During Cherry Blossoms, they’re virtually impossible – even on foot! In April I’ve even tried the big long-cut around the top of Hains Point (Buckeye Dr) just to come out on the other side of East Basin drive.
I personally find Independence, East Basin, and Raul Wallenburg to be completely un-bikable at rush hour – it’s all commuters going super-fast, and there are few shoulders on these “parkways”. I’ve had alot of bad experiences trying to take the whole lane.
Mark you make a good point – Independence from 14th to the Lincoln might be a perfect place for a bike lane. It could even be made as an addition to the sidewalk on the Mall side. (how would it work on that little bridge?) This would make the east DC-to-Arlington movement much easier – you could just roll all the way to the Memorial Bridge. The only drawback with using the Memorial Bridge is the pretty horribly unsafe at-grade “crosswalk” across the GW Parkway to get to the MVT and other trails in Arlington.