Perhaps obvious, but I’ll say it anyway: the reason this happens is because, unlike the road building, the railway switches can’t be placed absolutely at the edge of the adjacent object (station or another switch). There always has to be a gap, of up to three ‘clicks’ minimum I’ve found. Hence you get these tiny slivers of track at such places, which are then a pain in the backside come electrification; or reconstruction, for that matter: I spent some time trying to figure out why there was a collision on the alignment I’d just demolished track from, only eventually to spot the single sleeper that escaped demolition, lurking in the shadows under a bridge.
Cashflow being critical, it doesn’t take very long for backed-up trains to destroy the finances irrevocably.
Lesson learned…