An electric circuit made in a section of railway track as an aid to signalling, and able to be short-circuited by the presence of a train.
More example sentences
- Once the westbound train has progressed and the caboose is no longer occupying the detector track circuit of interlocking all intermediate signals will return to their normal status.
- When there are track problems, it could be a number of things - such as a track circuit, a broken rail or whatever.
- It was a broken track circuit today - something like that - I'm not so good on my railway terminology.