The platform-edge doors were introduced primarily to prevent draughts underground, assist in air flow and more importantly prevent people from falling or jumping onto the track.
They also prevent people from falling or jumping onto the track. The platform-edge doors were introduced primarily to prevent draughts underground and to assist in air flow.
The platform-edge doors were introduced primarily to prevent draughts underground and to assist in air flow. They also prevent people from falling or jumping onto the track.
The platform-edge doors were introduced primarily to prevent draughts underground and to assist in air flow. They also prevent people from falling or jumping onto the track.