En Hydrolly kunne også være en mulighed:

A hydrolley is a term for a streetcar or tram (trolley) powered by hydrail technology. The term (for hydrogen trolley) was coined at the Fourth International Hydrail Conference, Valencia, Spain, in 2008, as a research-simplifying search engine target word. Onboard hydrogen-derived power eliminates the need for overhead trolley arms and track electrification, greatly reducing construction cost, reducing visual pollution and eliminating the maintenance expense of track electrification. The term 'hydrolley' is preferred to 'hydrail light rail' or other combinations which might connote external electrification.[citation needed]

Kilde: https://en.m.wikipedia.org/wiki/Hydrail

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