This article is rated Start-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Trains: Operations Low‑importance Trains Portal DYK October 4, 2010 This article is within the scope of WikiProject Trains, an attempt to build a comprehensive and detailed guide to rail transport on Wikipedia. If you would like to participate, you can visit the project page, where you can join the project and/or contribute to the discussion. See also: WikiProject Trains to do list and the Trains Portal.TrainsWikipedia:WikiProject TrainsTemplate:WikiProject Trainsrail transport articles Low This article has been rated as Low-importance on the project's importance scale. Associated projects or task forces: /  This article is supported by the Operations task force. This article lacks references.

The description used seems to assume knowledge of the track-safety context, so is perhaps more suited to the expert reader. The article would ideally start of with a description of what a Track circuit interrupter is, rather than immediately plunging into where they could be used.

It is also unclear whether the TCI is an electrical connection in the normal state and an open circuit in the tripped state, or vice versa. Perhaps there are more than one kind (used by different signally systems?).--Wcoole (talk) 00:40, 2 October 2014 (UTC)