Considering Fairfax county VA (187), Prince William Co. VA (72) and Loudon County VA (61), Montgomery Co. MD (301) and Prince George's Co, MD (247) have the most cases in their respective states, and surround D.C., I'd say this is likely a good idea. (case numbers in parentheses, as of 03:00 CDT 3/30/20)
Virginia data:
http://www.vdh.virginia.gov/coronavirus/Maryland data:
https://coronavirus.maryland.gov/As the bedroom communities for D.C. are there, It is likely this is just the 'ejecta blanket', the center of that impact is in the District, itself, with 410 cases as of the latest update. That update was from a news article on CBS there, all official sources have the case count lower as of this time.
D.C. Official site:
https://coronavirus.dc.gov/Of course, those who ride in limos will likely be least affected.