I used to commute via BW parkway daily. In the evenings and more surprisingly on the weekends BW parkway is a virtual parking lot from the DC line it's stop and go, up through Greenbelt where you just stop. Eventually it becomes stop and go again until the far laurel exits and toward Arundel Mills. The thing that gets me is despite all the traffic on the DC end, there's roadwork and expansion work as you enter Baltimore. i don't want to claim regional bias, but I just don't get it. The DC area has more populace than Blatimore and more economic activity. yet, when i go to Baltimore i see more work being done on I-95, more interchange construction and more. the transporation investment is surely not equal.