Ramjett53 -

to the wild weird world of TS2014! You've joined the one of the two best forums (IMHO) for this sim.
To address, not answer, your question, many scenario writers write multi-part scenarios (MSTS called them "activities") that span different routes. That leaves the "connection" of routes in the imagination of the scenario writer and the player. For example, two excellent 3rd party routes are Michael Stephan's terrific Industrial Interactive Route (IIR) available here at RWA
http://railworksamerica.com/index.php/download-library/route-collection?view=document&id=6:industrial-interactive-route&catid=20:route-collection, and Bob Artim's excellent NERW route available here:
http://www.vnerrforums.com/nerw/(It's well worth registering for that forum as well, that's the
other "best" forum...)
One of the scenario writers at NERW has created a multi-parter starting on the IIR and the first part ends leaving the player at the virtual junction of the two routes. The second part picks up on the NERW at the matching point on that route. It's pretty slick and it joins routes virtually instead of physically. Having driven several of these it's a pretty effective way of using multiple routes for drivers to try out.
All to suggest that it's the imagination of the writers and drivers that makes this sim so much fun. You'll find more to do here than you'll know what to do with. (Trust me on this...

)
And don't be afraid to ask questions. There are folks here who can answer questions about many different aspects of simming, from routes to scenarios, to asset creation and usage.
Hope you find what you're looking for and most of all
HAVE FUN!Best regards,
Marc