This is lovely - I used to use YouTube recordings of Yamanote line trips as a way to fall asleep.

As a small bit of feedback - from the sleep perspective, the melodies and door chimes seem quite loud and frequent - would love an even more "backgroundy" version where the ambient travel sections are longer, and those chimes and melodies are quieter. Perhaps even with masking of human noises.

+1 on this - would love to have a more realistic timing mode where there are a few minutes of ambiance for travel sections in between station arrivals.