Metro reports that as of 12:43 p.m., regular service has resumed on the Blue and Yellow Lines after this morning’s collision. A Metro employee is believed to have been struck by a six-car train while on the tracks between the Braddock Road and National Airport stations. The male employee, whose identity has not been released, is said to be alive but in serious condition at a nearby hospital. The incident is currently under investigation, but earlier delays on the Blue and Yellow lines should soon be abating.