Automatic platform screen doors, also known as platform edge doors, are transparent safety doors installed at metro or subway station platforms that open only when a train is present at the platform. The key purpose of installing APSD systems is to increase safety of passengers by preventing them from accidentally falling onto the tracks or being hit by oncoming trains. APSD systems act as physical barriers between the platform area and tracks.

Benefits of Automatic platform screen doors Systems

Safety Improvement
Installing APSD systems significantly improves safety for passengers by restricting their access to the track area. The Automatic Platform Screen Doors close the gaps between the trains and platform edges, eliminating the possibility of any individual accidentally falling onto the tracks. This prevents potential injuries or loss of lives that could occur from incidents like jumping in front of moving trains, slipping or falling onto tracks while boarding/alighting trains.

Increased Efficiency
APSD systems help improve operational efficiency at stations. The doors allow for precise train-platform alignment as drivers can pull trains up right against the doors for smooth passenger transfer. This minimizes boarding/alighting time compared to conventional stations. The automated doors also facilitate increased service frequencies as shorter station dwell times become possible.

Reduced Delays
With automatic platform screen doors systems ensuring safe and controlled passenger movement, delays in train operations due to incidents like track intrusions are significantly reduced. This enhances reliability and improves overall network throughput. Less time is lost in attending to dangerous situations or retrieving objects that may fall on tracks.

Energy Savings
Installing APSD cuts heating/cooling losses at stations by reducing hole area for air exchange between platform and track. It aids in maintaining thermal comfort levels for passengers waiting for trains. The doors also help address noise pollution near stations by blocking noise transmission from tracks to the platform.

Key Components of an APSD System

Platform Screen Doors
The floor-to-ceiling transparent doors installed on the platform edge are a APSD system's key components. They divide the platform from the track area and have simultaneous opening/closing functioning.

Train Door Interface
Special interface mechanisms coupled with train door positioning systems ensure trains dock perfectly aligned with APSD every time to allow synchronized door operation for passenger transfer.

Control System
Advanced control modules equipped with sensors, logic units, and actuators enable automatic and safe operation of automatic platform screen doors. They detect incoming trains, control door movement as per real-time feedback.

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