Just looking at how successful the various systems are in Canada as of best data I can get at the moment
City km stations daily passengers
Montreal 69.2 68 1,111,700
Toronto 70 69 1,054,200
Vancouver 68.7 47 406,300
Calgary 48.8 36 263,603
Edmonton 21 15 95,315
Ottawa 5 8 14,200
TOTAL 282.7 243 2,932,538
Toronto is in the process of extending the Younge-University-Spadina line to Vaughn adding 8.6 km of line and six new stations. There is also the new Eglinton-Scarborough Crosstown Line will include the Scarborough RT and some 20 km more line westwards
Vancouver has started construction of the Evergreen Line which will add 11 km and six new stations to the Skytrain system.
Calgary is building the West LRT which will add 8 km and 7 new stations. Calgary is also extending the existing north west line by one station and the north east line by two stations.
Edmonton is currently adding three stations ona North LRT expansion