Sharraxaadda

Coming from VA, there is NO SIGN of any kind to warn motorists that Chain Bridge is being closed from 9 pm to 5 am. We tried to drive to DC at 10 pm last night, and found the bridge closed. If is difficult/dangerous to turn around where Chain Bridge Road and Glebe intersect just on the VA side of the bridge - why is not there a sign BEFORE VA drivers get to the point of no return? Also, I am on all the "alert" lists for DC, Arlington etc and have not received ANY noticse.