Ottawa City Council approved a rapid transit plan in November 2008. 
The approved plan includes Light Rail Transit (LRT) service along  Carling as a supplementary corridor with rapid transit service along  the Ottawa River Parkway, however,  the routing is subject to  Environmental Assessment (EA) studies, and the Western  Corridor EA is considering rapid service along Carling versus the  Ottawa River Parkway, among other things.
http://ottawa.ca/residents/public_consult/lrt_west_corridor_ea/index_en.html
There will be on-going public consultation activities during both phases  of the Western Light Rail Transit Corridor Planning and Environmental  Assessment study, including several Public Open House events. 
This first Public Open House was held on November 29th in order to provide an overview of the work  underway, including information on the existing socio-economic and  natural environments within the study area, project need and  justification, project planning objectives and design criteria,  alternative transit corridors, transit technology, and the methodology  proposed to evaluate alternative transit corridors.
Transportation Master Plan:
http://ottawa.ca/city_hall/master_plans/tmp/maps/index_en-03.html