Metro News Release

For immediate release: July 15, 2012

Investigation continues into Saturday computer issue affecting Metrorail service

Technicians continue working to identify the cause of a computer problem yesterday that prompted Metro to hold trains in stations until the system was restored.

The computer problem affected an information management system that allows controllers in Metro's Rail Operations Control Center to see where trains are on a dynamic map and to remotely control switches. The first occurence affected service between approximately 2:10 p.m. and 2:50 p.m. Saturday.  During this time, 44 Metrorail trains were instructed by controllers to hold their position at the next station, in an abundance of caution.  A second occurrence between 12:30 a.m. and 1 a.m. early Sunday morning resulted in a brief hold, after which trains were permitted to move with radio permission from controllers.

All safety systems that keep trains properly spaced remained fully operational during both occurrences.  Train movement at all times was governed by wayside signals (essentially traffic lights alongside tracks), as well as speed commands transmitted to each train's control cab. Radio communication between the control center and trains was maintained at all times.

No new issues have been reported on Sunday.

As the investigation continues, Metro's Rail and IT departments are taking precautionary steps to minimize the chance for additional problems. Metro will post additional supervisory staff at key locations during the Monday morning commute to respond quickly in the event of any technical issues. 

News release issued at 4:22 pm, July 15, 2012.