Platform gap fillers are movable platform edge extensions at subway or railway stations where the curvature of the platform creates a significant gap between the platform and subway or train car door.
Platform gap fillers being trialled at Platform 3 of Lo Wu station in Hong Kong in 2009.
Carleton station on the Trillium Line is the only station with two platforms. Note gap fillers at solid yellow markings.
South Ferry station with gap fillers extended out to a 1 train, as reopened on April 4, 2013.
The downtown express track at 14th Street – Union Square. A retracted gap filler can be seen at the bottom of the image along the platform edge, with additional gap fillers visible in the distance.
A platform gap is the space between a train car and the edge of the station platform, often created by geometric constraints, historic legacies, or use of partially compatible equipment.
A Central line platform at Bank tube station, London, showing the 1-foot (30 cm) gap between the train and the platform edge (delineated by a solid white line).
Significant vertical and horizontal platform gap at University station on the MTR system in Hong Kong
This German regional train (DB class 442) has door-mounted gap fillers
The severe concave platform curvature at 14th Street–Union Square requires gap fillers at regular intervals
