If your normal commute in NoVA isn’t stressful enough, Metro is throwing another challenge to Silver, Orange, and Blue line riders. Commuters who slug to the Pentagon and transfer to the Metro have to take the bus instead. Starting August 11, 2018, WMATA will be performing maintenance work along the Silver, Orange, and Blue lines for the next 2 weeks. Silver and Orange lines will be single-tracking between McPherson Square and Smithsonian stations, with trains running every 20 minutes, with…