Our next Welsh route should be Carmarthen - Swansea & Bridgend at 48.3 mi to Bridgend and 48.3 mi adding up to 75.8 mi. I believe the longest route in TSW alltogether is Schnellfahrstrecke Kassel – Würzburg which is 115 mi, so I think Welsh marches Carmarthen to Swansea & Bridgend would be perfect, using the Class 801/1 with 5 cars, and 10 cars in GWR livery, The Class 175 in TfW Red livery and unbranded Arriva Trains Wales livery, the 150 in TfW Red livery and unbranded Arriva, the 197 in TfW Red, the 153 in TfW Red, and finally the obvious Class 66.
Awesome route idea and rolling stock what form is the signalling is it colour lights semaphores or RETB or a mix ?