IF you've travelled overseas you've probably seen this technology on major rapid transit networks, used by millions of people daily.
But this is the first time it will come to Australia, with Baulkham Hills MP David Elliott saying the new platform sliding screen doors will be used on the $8.3 billion North West Rail Link.
A Transport for NSW spokesman said the technology creates a physical barrier that prevents passengers or objects, such as prams, from falling on to the track.
This keeps people and objects away from the tracks, while allowing trains to get in and out of stations much faster, the spokesman said.
See how the doors work:
International supplier Faiveley Transport has been awarded a $35 million euro contract to design, manufacture and deliver the doors.
"Work is already under way to adapt the already proven technology to the specific requirements of the North West Rail Link, with manufacturing to start later this year," the Transport for NSW spokesman said.
"In the new underground rapid transit stations, full height doors separate the platform environment from the track.
"This also increases passenger comfort, because stations will be able to be heated or cooled.
"There will be signs and announcements on the platform to help guide customers to where they need to stand to get on the trains."
More than 450 doors and barriers will be delivered across 26 platforms at 13 stations on the rail link.
The equipment will be manufactured in Europe and Shanghai, China, and delivered to Australia, where installation will be managed by the manufacturer's Australian office.
"These systems mean customers can get on and off trains faster because everyone knows exactly where the train will stop and where the doors will open, allowing customers to queue next to the doors and use the whole length of the platforms," Mr Elliott said.