This route is by Dovetail Games. You can find it here: https://store.steampowered.com/app/1211470/Train_Simulator_Fife_Circle_Line_Edinburgh__Dunfermline_Route_AddOn/
(Fictional). Take a class 68 and a rake of Mk2 carriages on an evening commuter run out of Edinburgh Waverly, calling at all stations to Inverkeithing. You will have to deal with peak-time traffic to get immediately out of Edinburgh, but you should have a clear run once you reach the Fife Circle. Do your best to keep to time, as there are lots of hungry workers wanting to get home for dinner with their families.
Difficulty: Medium
Requirements:
AP class 68 EP
AP Mk2D-F coach pack
You can find them here:
https://www.armstrongpowerhouse.com/enhancements/locomotive/class_68_enhancement_pack
https://www.armstrongpowerhouse.com/rolling_stock/coach/mk2d-f_coach_pack