With us now having the 220, and multiple sections of the wcml, it would make sense to have a headcode hopping feature: Headcode Hopping One example for this would be 1M41, which can be playable across 4 routes in the 220 Voyager across Manchester Airport Commuter, Birmingham to Crewe (B2C), Birmingham Cross City (BXC) and Riviera Line, totalling to just over 2 hours gameplay. While it is easy enough just to search for the headcode, it'd be a nice feature to have the option at the end of a service to continue the journey on another route. Another example of this is the Walsall-Wolverhampton services, playable in game from Aston to New Street (BXC) and New Street to Wolverhampton. NOTE: This feature is not a priority: maybe a part of TSW7? There are tons of bugs and issues that are much more important than new features, so although I'd like this to get implemented at some point, I wouldn't want it to prioritise bug fixes.
This question will arise more and more in the future, as there will be more contiguous routes. It's worth noting that this would be a solution for those who find the routes and services too short in TSW.