The doors on a rail car stopped at L’Enfant Plaza opened on the wrong side of the train last week, briefly removing the barrier between riders and the track bed. 

A Green Line train heading to Greenbelt was at L’Enfant Plaza on Friday about 7:16 p.m. when the incident occurred, according to Metro spokesman Dan Stessel. The doors were open on the wrong side of the train for about three seconds, he said. 

The cause is believed to be human error, Stessel said, rather than a case of the doors spontaneously opening. The train operator involved has been removed from service and an investigation is ongoing. 

There were no injuries and no delays to service, Stessel added. 

Doors have long been a frustrating problem for Metro riders and train operators alike. These headaches range from malfunctioning doors, which can lead to trains being offloaded, to something as commonplace as doors closing too quickly for some riders.  

The L’Enfant door issue was first reported by the blog Unsuck DC Metro.