This intersection closed yesterday, and several alternative roads in the area have opened (see https://www.montgomerycountymd.gov/whiteflint/).  I'd like to get OpenStreetMap updated soon; I'll probably start working on it today.  I can probably do an adequate job of making the most important updates, though I'm sure a more advanced user could do a better job.  If you'd like to help, please let me know ASAP to avoid duplicating work.  Thanks!