Concerning this talk about who's in or out in respect to metros here is the definition found on Wikipedia:
"Rapid transit or mass rapid transit, also known as heavy rail, metro, MRT, subway, tube, U-Bahn or underground, is a type of high-capacity public transport generally found in urban areas.[1][2][3] Unlike buses or trams, rapid transit systems are electric railways that operate on an exclusive right-of-way, which cannot be accessed by pedestrians or other vehicles of any sort,[4] and which is often grade separated in tunnels or on elevated railways."
https://en.wikipedia.org/wiki/Rapid_transit
I think that excluding Montreal because their trains have rubber tires (which is the first time I hear such non sense) is non sense.
Excluding Vancouver because it is elevated is equally silly.
Excluding both Calgary and Edmonton is reasonable since so much of their lines are shared with traffic and are slow moving at several points.... They have classic LRT systems.
Such is the case with Rouen's rail system, which locals call the "metro" but which is a term put in quotes in the French language page of the system to highlight the rather liberal use of the term.
"Le tramway de Rouen, localement dénommé le « métro » de Rouen, est un réseau de tramway circulant en site propre."
https://fr.wikipedia.org/wiki/Tramway_de_Rouen