I have several questions regarding the development:
- Will the "tram-train" be entirely grade separated, or will there be street-running?
- If there is street running, what will power the trains? 25kV AC is not really suitable for street running, so will it be battery-electric, dual voltage, diesel or even a Parry People Mover-style flywheel system?
- Will there be provision for freight (ie. Aviation fuel) to use the line? Prestwick airport gets its fuel by train. It makes sense for Glasgow to do the same.
Edit: RailQwest are urging that GARL should be completed as heavy rail and not light rail. I fully agree with and support this stance.