A system of railway signalling which divides the track into sections and allows no train to enter a section that is not completely clear.
铁路闭塞信号系统（将铁路分成数个路段，使任何列车不得通过非绝对畅通路段的信号系统）
Example sentencesExamples
The most used sections now use a variation of the moving block system, which means traffic is defined by trains, not by blocks, so trains can be closer and run more often.
An electric staff block system was in use between Melville Jct. and Fraxa Jct.
At one time it was controlled by an electric staff block system.
Electricity was also used by the block system of signalling, to keep trains apart.
He describes the first electrical equipment as well as the progressive adoption of electro-semaphore signalling and the organisation of the block system.
Definition of block system in US English:
block system
noun
A system of railroad signaling that divides the track into sections and allows no train to enter a section that is not completely clear.
铁路闭塞信号系统（将铁路分成数个路段，使任何列车不得通过非绝对畅通路段的信号系统）
Example sentencesExamples
At one time it was controlled by an electric staff block system.
An electric staff block system was in use between Melville Jct. and Fraxa Jct.
He describes the first electrical equipment as well as the progressive adoption of electro-semaphore signalling and the organisation of the block system.
The most used sections now use a variation of the moving block system, which means traffic is defined by trains, not by blocks, so trains can be closer and run more often.
Electricity was also used by the block system of signalling, to keep trains apart.