1) Certain route 2) Greyhound or trailways 3) Urban transit route
Found on
https://www.crosswordclues.com/clue/busline
Term used by LU to refer to a power cable running the length of a train or unit, which supplies all high voltage systems. Buslines were forbidden on the tube lines and, in the days when trains used 600 volt circuits for most control as well as power circuits, elaborate precautions were taken to ensure that power connections between cars never carr...
Found on
http://www.trainweb.org/tubeprune/dictionary.htm
No exact match found.
