Definition of "unsignalled"

unsignalled

adjective
not comparable
1. (British spelling) Not signalled.
  Quotations
  The line was entirely unsignalled, and the numerous level crossings were unprotected, save by warning signs on the roads.
  1945 November and December, “Notes and News: The West Sussex Railway”, in Railway Magazine, page 361
  On the other side of the road the double track admits to a complicated rail network totalling some 78 miles of dockside track that carries more express passenger traffic than any other completely unsignalled layout in the country, in addition to a huge tonnage of freight.
  1959 February, G. Freeman Allen, “Southampton—Gateway to the Ocean”, in Trains Illustrated, page 88
  During the year, GBRf also gained significant additional cement business in the shared area of DB Cargo and BP track which is unsignalled. Network Rail worked with the landowners, as well as DB Cargo, Freightliner and GB Railfreight, to come up with a safe method of working for this shared area of track.
  2019 November 6, Andy Coward, “Fuelling additional rail freight traffic”, in Rail, page 60