After I had gotten the Dahon Speed UNO, I have started commuting with it on trains and boats. Haven't tried a bus yet, but perhaps next year if I visit Victoria BC using Pacific Coach on my usual museum run or into Tofino BC.
Initially, I NEVER considered multi-modal commuting as I always consider people who do this are weak cyclists. I used to cycle pretty much every where, except needing a boat to cross the channel from time to time. But when I saw at least 2 friends who I know are strong cyclists and had done PBP (Paris Brest Paris) very well and use their folders on commuter trains just to save some time, then I realize it is a viable efficient solutions to longer commute or out of city travels.

I chose the Speed UNO simply because of simplicity and folding size. No cables to worry about. Can be rolled folded and I have the Dahon carrying bag. The size of the bike crucial as well since our old Gen 1 Skytrain here has smaller cars with narrow corridors.

There is no shame commuting by bike with trains, buses and boats as you are helping to green the environment!