WASHINGTON, DC (WUSA) -- It didn't happen once, but twice where Metro's system came to a halt when a computer screen that tracks the trains went dark.
A technical team has been working around the clock at central control to find out the mysterious computer glitch with Metro.
106 miles of rail on 5 lines with 44 cars, came to a complete stop on DC's metro rail. The screens at the control center in Prince George's County went dark for roughly 45 minutes in both cases.
Randy Duncan is hoping there's not a repeat of his ride Sunday morning after he was stuck on a train during a second computer glitch.
"it was terrible it took 3 hours to get home. It was from 12am to about 3am."
He says the train operator did communicate to passengers there was a computer problem.
"Once it did move again we got off the train and had to catch shuttle buses.
But he says the bus took him to Pentagon City in Virginia when he was just trying to get home from Anacostia to Fort Totten.
For the second time within 12 hours this weekend, the moving map that shows the location of each train malfunctioned.
The first glitch happened at 2 Saturday afternoon, forcing the trains to stop and be directed to the nearest station.
The second incident happened at 1 Sunday morning. With fewer trains Metro says there was a brief stall before trains could operate at reduced speeds.
In both cases the problem was resolved by rebooting the system.
DC Council woman Muriel Bowser is also a metro board member.
"We'll get an answer and get to the bottom of it." We are all very frustrated."
Metro says this was not a power outage, they didn't lose communication with trains, and the system which indicates the proper distance between the trains remained operational.
Metro will post additional supervisory staff at key locations during the Monday morning commute to respond quickly in the event of any technical issues.