page_title: Japanese railway signals
section_title: Call-on signal
hierarchical_section_title: Japanese railway signals / Fixed signals / Main signals / Call-on signal
caption_attribution_description: English: Call on signal at Odakyu Shinmatsuda Sta. 日本語: 誘導信号機の例（通常の鉄道用信号機の下にある斜め2灯の信号機） 前方に列車がいる。 小田急電鉄新松田駅にて（列車内から撮影）
context_page_description: Japanese railway signals, according to the ministerial decree defining technical standards of railways, are defined as indicating operational conditions for railway staff driving trains.
  Japanese signalling was initially based on British railway signalling, and Japanese railway signalling continues to be based on the UK route signalling system. However, as signalling has advanced to meet the requirements of the system, the Japanese signalling system is a mixture of route signalling and American speed signalling.
context_section_description: Normally, only one train can enter a block section for safety; however, with this rule a train cannot be coupled with another train. A call-on signal (誘導信号機, yūdō shingōki) permits a train to enter a section already occupied by another train to enable coupling.
  A call-on signal is installed under a home or shunting signal. The train guided by a call-on signal can proceed under 15 kilometres per hour (9.3 mph)—25 kilometres per hour (16 mph) on some lines—until it reached the forward train. In stations where two trains use the same track simultaneously—for example, the Yosan Line Matsuyama Station (Ehime) and the Nankai Kōya Line Hashimoto Station (Wakayama)—call-on signals are required to allow two trains on a single block section. However, this is unnecessary if the platform track is divided into two block sections (for example, the Keihan Main Line Yodoyabashi Station of the Keihan Electric Railway).
  There are two types of call-on signal (position and color). Both lights are normally off, and only lit if required. Position lights use two diagonal white lights; color lights are yellow.
caption: Two diagonal white lights under a red light
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