Since beginning service in 1967, GO Trains have operated on tracks
owned primarily by Canada's two major commercial railways: Canadian
National Railway (CN) and Canadian Pacific Railway (CPR).
Over the past several years, Metrolinx has been acquiring segments of
the rail lines on which GO Trains travel. Ownership of the tracks
and adjacent property allows for control over maintenance and expansion
work.
Currently, Metrolinx owns 69% of the GO Train corridor network, and
work is already underway to prepare the infrastructure for more
passenger rail service in the coming years.