I have done several train mixes over the years. They basically come about because I hear a tune and think - Hey, that would be great in a train mix. So it was with this one. I heard the track "A.O.E." by Portico Quartet and I knew immediately that I need to build a mix around it.
This mix differs from most of my other train mixes(except one) because it's mostly a jazz influenced mix. Berlin-school sequencers have been replaced by a drum kit and synth washes with horns. I folded in some recordings of trains and subways but I didn't want to over do it, so I kept it to 3 spots in the mix.
The mix has some good energy and I could see it being a great companion for bike riding.