Trains > busses and trams > Smaller EVs > Electric Boats > efficient gas vehicles > large EVs > innefficient gas and diesel vehicles incl boats> Airplanes
The issue with electrifying rail networks is that it’s very expensive and modern diesel-electric locomotives are already over a hundred times more efficient than trucks. So while it does reduce emissions to replace a diesel locomotive with a fully electric train you’re far better off getting hundreds of trucks off the road and adding one new diesel-electric locomotive!
Trains > busses and trams > Smaller EVs > Electric Boats > efficient gas vehicles > large EVs > innefficient gas and diesel vehicles incl boats> Airplanes
Walking and cycling should probably be right after buses and trams.
The issue with electrifying rail networks is that it’s very expensive and modern diesel-electric locomotives are already over a hundred times more efficient than trucks. So while it does reduce emissions to replace a diesel locomotive with a fully electric train you’re far better off getting hundreds of trucks off the road and adding one new diesel-electric locomotive!
I would say that’s an efficient diesel vehicle which just sort of slots in with its vehicle type in the list above, but good points.
In Europe, short haul and long haul flights are more efficient than diesel vehicles actually. Short domestic flights are worse though.
https://ourworldindata.org/travel-carbon-footprint