Platform Screen Doors (PSDs)
Physical barrier systems engineered for high-density rapid rail and metro corridors — preventing track intrusion, ensuring passenger safety, and synchronising flawlessly with train door operations.
Discuss Your Transit ProjectKeeping People Safe at Metro Stations
Platform Screen Doors (PSDs) isolate station platforms from the track. They are in sync with train doors, synchronously controlled throughout the length of the platform.
Omega’s Platform Screen Doors (PSDs) provide full-height or half-height barrier systems that physically isolate station platforms from the track area. These PSD doors are precisely synchronised with train door operations via interlocking controls, ensuring openings occur only when trains are aligned and it’s safe for passengers.
PSD installations act as a continuous physical barrier, separating passengers from the charged train tracks. This prevents accidental passenger falls, unauthorized track access, trespassing, and objects from falling onto the track.
OMEGA has successfully completed PSD installations for 22 stations for Ahmedabad–Gandhinagar Metro Phase 2. Upcoming installations are scheduled for Surat Metro and multiple other metro networks across India.
Full-Height and Half-Height Platform Barrier Systems
Engineered barrier configurations for every station type
Platform design dictates barrier engineering. Omega builds full-height enclosed systems for underground stations requiring HVAC containment alongside half-height aerodynamic gates for elevated transit viaducts.
Full-Height Platform Screen Doors
Floor-to-ceiling glass barrier systems for underground metro stations and climate-controlled corridors.
Full-height PSDs form an airtight, acoustic partition between the station platform and tunnel shaft. By completely sealing the platform edge, full-height systems contain air-conditioning, dramatically reduce station cooling load, isolate piston wind and train noise, and eliminate any possibility of track intrusion.
Key Engineering Attributes
Half-Height Platform Edge Doors (APGs)
Chest-height safety gate barriers designed for elevated, outdoor, and open-air transit platforms.
Automatic Platform Gates (APGs) or half-height platform edge doors provide critical fall protection on elevated and viaduct stations where full air-tight ceiling sealing is not required. Designed with aerodynamic stability to withstand outdoor wind shear and train-generated air currents while allowing natural ventilation.
Key Engineering Attributes
Emergency Egress & Service Doors
Fail-safe manual breakout doors ensuring uninterrupted passenger evacuation during emergencies.
Strategically spaced along the platform screen door facade, emergency escape doors (EEDs) feature mechanical panic push-bars that allow passengers to push open the doors from the trackside into the platform in an emergency, even during complete power blackout.
Key Engineering Attributes
Technical specifications & parameters
Every Omega Platform Screen Door system is engineered in strict compliance with international rapid transit standards (EN 50126, EN 50128, EN 50129, and IEC 61508), ensuring dependable cycle performance under the highest urban passenger volumes.
| Engineering Parameter | Full-Height PSD | Half-Height Gate (APG) |
|---|---|---|
| Standard Door Height | 2,100 mm to 2,500 mm (floor to ceiling lintel) | 1,200 mm to 1,600 mm (chest barrier height) |
| Clear Door Opening (CDO) | 1,800 mm to 2,200 mm (aligned to train doorway) | 1,800 mm to 2,200 mm (aligned to train doorway) |
| Door Panel Movement | Bi-parting sliding panels (synchronous dual drive) | Bi-parting sliding panels (synchronous dual drive) |
| Opening / Closing Speed | 0.5 – 0.8 m/s (adjustable 2.0 s – 3.0 s cycle time) | 0.5 – 0.8 m/s (adjustable 2.0 s – 3.0 s cycle time) |
| Glass Construction | 10 mm / 12 mm clear laminated toughened safety glass | 10 mm / 12 mm tempered & laminated acoustic safety glass |
| Drive Motor & Transmission | High-torque brushless DC servo motor with synchronous toothed belt | High-torque brushless DC servo motor with synchronous toothed belt |
| Safety Integrity Level (SIL) | SIL-3 / SIL-4 compliant interlocking safety loop | SIL-3 / SIL-4 compliant interlocking safety loop |
| Train Signaling Interface | CBTC / ATO hardwired & serial interface with fail-safe loop | CBTC / ATO hardwired & serial interface with fail-safe loop |
| Obstacle Detection (Anti-Pinch) | Multi-beam optical light curtain + motor current sensing | Multi-beam optical light curtain + motor current sensing |
| Manual Emergency Breakout | Emergency push-bars opening 90° towards platform | Trackside emergency manual release latch |
| Wind Load Resistance | Withstands tunnel piston pressure ±1,500 Pa | Engineered for outdoor aerodynamic wind loads up to 2,000 Pa |
| Power Supply & Backup | 230V AC ± 10%, 50 Hz single phase with 60-min central UPS | 230V AC ± 10%, 50 Hz single phase with 60-min central UPS |
| Operating Life Cycle | Over 2,000,000 continuous door opening/closing cycles | Over 2,000,000 continuous door opening/closing cycles |
Standard safety devices & interlocking
Omega Platform Screen Doors operate on a SIL-3/SIL-4 fail-safe safety architecture, ensuring that passenger safety is hardwired into train signaling protocols.
| Safety Device / Subsystem | Fail-Safe Function & Protective Action |
|---|---|
| CBTC / ATO Train Interlocking | Guarantees PSD doors can only open when train is stationary and properly berthed |
| Multi-Beam Infrared Light Curtain | Detects passengers or belongings obstructing the doorway during closure |
| Sensitive Edge & Motor Current Sensor | Stops and re-opens the door panels immediately if physical resistance is encountered |
| Platform-to-Train Gap Laser Sensor | Scans the gap between platform edge and train door to prevent passenger trapping |
| Manual Emergency Breakout Push-Bar | Enables passengers to push open egress doors manually from trackside without power |
| Platform Emergency Stop (PES) Button | Instantly halts train departure and freezes door movement during track emergencies |
| LED Door Status Indicators | High-visibility visual lights displaying green (open), flashing (closing), and red (locked) |
| Audible Departure Warning Chimes | Clear audible signals warning boarding passengers prior to automatic door closing |
| Station Master Emergency Key Override | Allows authorized staff to open or isolate specific doors during technical interventions |
| Continuous Safety Circuit Loop | Hardwired fail-safe loop wired directly into train propulsion interlock |
| Auxiliary Uninterruptible Power Supply | Maintains full door control and safety monitoring for minimum 60 minutes during power outage |
| Central SCADA Telemetry Unit | Transmits real-time door position, fault codes, and cycle counts to the Operation Control Centre |
Transit safety & platform door FAQs
Clear technical answers covering signaling interfaces, safety integrity levels, HVAC energy savings, and installation timelines for rapid transit authorities.
Have a specific metro station enquiry?
Connect directly with Omega's public infrastructure and transit systems engineering team for feasibility studies and station drawings.
Consult Our EngineersPlatform Screen Doors (PSDs) typically refer to full-height glazed barrier systems running floor-to-ceiling in underground metro stations, providing full acoustic and air-conditioning sealing. Platform Edge Doors (PEDs), often called Automatic Platform Gates (APGs), are half-height systems (1.2–1.6 m) designed for elevated and open-air stations where fall protection is required while allowing natural station airflow.
Consult with our rapid transit PSD specialists
From signaling integration to structural wind-load engineering, Omega provides end-to-end Platform Screen Door design, fabrication, installation, and commissioning.
+91 79 2665 2015
info@omega-elevators.com
Complementary transit mobility systems
Omega delivers fully integrated transit mobility — combining platform barrier systems with heavy-duty escalators and passenger elevators.
Public Infrastructure
Explore high-capacity vertical mobility solutions engineered for major civic, rail, and airport transit hubs across India.
Heavy-Duty Escalators
High-traffic escalators engineered to operate 20 hours daily under continuous transit pedestrian loads.
Moving Walks & Travelators
Flat and inclined continuous passenger conveyors for airports, railway stations, and multi-modal transit corridors.