The featured image for this short article is the petrol motor-car used by the Croydon District Engineer of the London, Brighton, and South Coast Railway, in connection with his duties. The car was block-signalled in the same way as a train and carried head code discs. It was included in The Railway Magazine of July 1906. ...

http://rogerfarnworth.com/2024/10/27/ea ... tion-cars/

Examples come from a variety of jurisdictions ...