When I got to the train station today on my way to work, the screen with the train schedule said that the next train was a "test". Two minutes later, a shiny new train full of people in uniforms and hard hats pulled into the station, and there was an announcement over the loudspeaker that this was not our train and to please wait for the next one. The train made the music for announcing the closing of the doors, even though the doors hadn't been opened, and the train left the station. My train arrived shortly thereafter. I've never seen a train test before, and it's nice to know these things are tested and inspected before being put into use.
Haiz, I hope you aren't injured. My mom broke her elbow slipping on black ice last year. That ice can be sneaky and painful!