James Dougherty, the chief safety officer for the San Francisco Municipal Transportation Agency, is WMATA’s top choice to replace Alexa Dupigny-Samuels as Chief Safety Officer, WTOP’s Adam Tuss reports. A deal is not yet in place, but Metro officials have apparently zeroed in on Dougherty, who has been with SFMTA for about a year, as their top candidate. Dougherty was awarded the National Safety Council’s Distinguished Service to Safety Award in 2009. Before joining SFMTA,…