I attempted to get up to DC for the cherry blossom festival, but ended up setting out too late...but I went up there anyway. Cherry blossoms were a letdown due to damage from severe storms the previous day but I have plenty of road pictures, including some photos of the HOT lane construction on I-95 south of where the HOV lanes currently end.
Since I'm trying not to drown other photos on my Flickr page, I have restored my "road trip" Flickr page and uploaded the photos there.
http://www.flickr.com/photos/willshighways/sets/72157633250563514/detail/