Metro riders should expect delays of 30 to 40 minutes on all lines, except the Red Line, where delays up to 20 minutes are expected. It will be another long morning for Metrorail riders as delays amid a Blue Line derailment investigation enter their third day. Metro said passengers should expect 30 to 40-minute delays again Wednesday on all lines except the Red Line. Red Line trains should arrive every 15 to 20 minutes. “There is currently no capacity to fill unforeseen gaps, which will result in longer wait times,” Metro said in a news release.