Definition of "single-track"

[…] a single-track main line between Richmond, Ind., and Norwood Heights, Ohio

1942 February 1, “Pennsylvania Installs Centralized Traffic Control On 60.7 Miles of Single Track”, in Railway Signalling, Chicago, page 78

It was once the busiest singletrack section of railway line in the country but, almost three decades after its closure, the short route which once linked Tunbridge Wells’s two stations is a ghostly presence

2013 March 1, “Fears for future of vital link between two train stations”, in The Kent and Sussex Courier, Tunbridge Wells, Kent, page 14

On the now defunct Guildford-to-Horsham line, there was a foolproof way of avoiding collisions on singletrack lines

2016 February 18, Peter Le Feuvre, “Letter to the editor”, in The Daily Telegraph, page 17

Highglen elementary school will maintain a dual-track system of a Montessori program and a regular neighbourhood school program side-by-side for one more year, Prince George trustees decided this week. In January, the board had voted in favour of making the Montessori program into a single-track program where it would occupy an entire school like Highglen.

2003 April 19, Paul Strickland, “Single-track Montessori on hold until 2004”, in Prince George Citizen, Prince George, British Columbia, page 3

This week the district placed Cathedral City Elementary and Landau Elementary back to a “single-track” schedule in which all students attend school on the same days throughout the year. A few years ago, overcrowding forced the district to split students into tracks so that some kids attended classes while others were on vacation.

2006 April 15, “Our voice”, in The Desert Sun, Palm Springs, California, page B10