Introduction: As we all know, currently routes aren't planned to be merged (if the routes which could be merged are added) (if they share any stations, that is, mostly because only 2 do, one of which was left behind on TSW2020, and the others share a terminus and not a through station.) for the simple reason if it could end up getting too long, and no longer able to perform well, as for extensions it's DLC to DLC but is doesn't have to be, I'll come back to that. Merging Routes/Services As we currently don't actually have any routes which have a case of: Route A: A-B & Route B: B-C, I'll have to make an example. Let's say it's the well requested Great Western Express extension to Oxford. (Which is kinda feasible to just be added to route, its about the right length, but we'll go with it for now). So say Dovetail released a new Reading - Oxford route, and you buy it. So your on Great Western Express (the real one) In your HST, and you arrive at reading, you open the doors, and you receive a pop-up: (Owners of both routes only obviously): Service Continuation You have reached the end of your service on this route. Would you like to continue on Great Western Express: Reading - Oxford? Continue Service | Finish Service Finishing: If you click finish service, your service ends and you get the graph, so the usual. Continuing: If you choose to continue, you will now recieve a loading screen. Now, you will be loaded back in on the other route (so in this example GWE2). As for extensions: People think extensions have to be DLCs to DLCs (one may argue that's what a loco dlc is however I won't get into that) Thing is, they don't, have to be Yeah, if it's a short branch line it probably would be, but if it's a mainline (Say Chatham Mainline is added, for example) you could just get the Chatham Mainline as a standalone route, without needing SEHS. If you have SEHS you could use the above system, so when your driving on SEHS on a Victoria bound service, when you are at your last station on the SEHS section you would get the above pop-up. In conclusion, this means that owners of two, seperate routes can drive a continuous service with the only gap being a loading screen. Thank you for reading.