page_title: Platform gap
section_title: Gap fillers
hierarchical_section_title: Platform gap / Gap fillers
caption_attribution_description: Deutsch: Schiebetritt des Talent 2 442 811 in Dresden Hbf.
context_page_description: 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.
  Many high-quality bus rapid transit systems also use high platforms at station stops to allow fast and efficient level boarding and alighting, but potentially leaving hazardous gaps between the platforms and the buses. Alignment setups such as Kassel curbs help to reduce platform gaps without requiring time-consuming manual alignment at each BRT station stop.
context_section_description: Mechanical platform edge extensions known as platform gap fillers may be used to bridge the gap between platform and vehicle.  These stopgaps require careful alignment of the vehicle upon arrival, and careful synchronization to avoid serious damage caused by departure of the vehicle before the extenders are fully retracted.  They increase station dwell time, and introduce safety and maintenance concerns of their own.
  Alternatively, the gap fillers may be mounted on the train, and linked to the door operating mechanism. They may be found on modern trainsets, like various versions of the Stadler GTW. Train-mounted gap fillers eliminate the need for careful alignment and, as the driver only gets the signal that the doors have closed when the fillers have fully retracted, require no special synchronization on departure.  Moving all active components of the system to the train instead of the platform allows maintenance to be performed in a shop, rather than in the field.  Singapore has committed to specifying its newer trains with gap fillers, to reduce the incidence of platform gap accidents in its crowded stations.
caption: This German train has door-mounted gap fillers
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