(12 Jan 2014, 11:18 am)JP6004 wrote South Tyne - operates South Tyneside
Diamond - route it takes shapes out diamond on map
Orbit - similar to loop in terms of meaning
Pulse - like it states runs through heart of Gateshead (past hospital)
Highwayman - runs along whickham highway
East Durham - operates in east Durham
Lime - forgot what connection is
I think someone (andreos1?) has touched upon this before, and that it may be related to the former limestone mining around the areas it serves between Consett and Chester Le Street.