As it turns out, this is a Virginia Department of Transportation issue. Arlington County has contacted VDOT and made them aware of the complaint.

Wow, I'm impressed with the quick responses. It is a VA DOT responsibility.

I sketched out below a quick fix:

I think part of the problem is that this stretch of Rt.1 gets a lot of traffic of tourists from the hotels in Crystal City, as well as the Airport.

The other problem is motorists coming north off of the 15th Street on-ramp, trying to get to 110. Marking "VA" in the lane they need to get into would confuse the motorists coming over the 15th street overpass, but maybe if just "DC" was marked in their right-most lane, they'd figure out they should merge left.

just in case it's not obvious, I photoshopped that photo to show the VA VA DC markings.

Don, this information has been forwarded. Please feel free to contact VDOT directly.

Capt. Berke, I'm still seeing near-accidents happen. Do you have anyone I could email at VDOT?

VDOT’s Highway Helpline can be reached by calling 1-800-367-7623, or you can submit an online work request here: http://www.virginiadot.org/travel/citizen.asp To help identify Streets maintained by VDOT, see this link: http://www.arlingtonva.us/Departments/EnvironmentalServices/cpe/row/EnvironmentalServicesState.aspx