Prior to V1.8.2, it was pretty rare to see anyone driving on this route, as R009 (Stepford Victoria <> Edgemead) was more popular and was free. However, R009 is now driven less frequently after being replaced by R045 (Stepford Victoria <> Leighton City) as a free route.
Though R009 is the only Stepford Connect route with a 9 headcode that can be driven by any train, which still makes it more popular than this route.
This route is one of the most complicated routes to unlock, as it requires points, experience, and an already unlocked route (R003 in this case).