🌐EnglishEnglishDeutschFrançais한국어中文日本語EntityQ7447765· pop 6· linked from 56 articlesselective door operationAlso known as SDOtechnology that disables individual sets of doors on transit vehicles or buildingsAvailable in 5 languagesDeutsch中文日本語한국어via Wikidata sitelinks · CC0ConnectionsUnited KingdomCountryBostonEntityCategoriesPassenger rail transport in the United KingdomRail technologies