🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ1316667· pop 27· linked from 1,060 articlesrailway signalling systemsystem with signals used to control railway trafficConnectionsrailway trackEntitysignalling controlEntityCategoriesRail infrastructureRailway signalling