the Downtown Relief Line

http://www.drlnow.com/history.html

http://en.wikipedia.org/wiki/Union_Pearson_Express#Rolling_stock

https://www.google.ca/search?q=the+Downtown+toronto+Relief+line&espv=2&biw=1920&bih=971&tbm=isch&tbo=u&source=univ&sa=X&ei=mClSVef9PM-zogTKhoCQAw&ved=0CCMQsAQ

http://www.thestar.com/news/gta/transportation/2015/02/26/scarboroughs-creaking-srt-gets-a-makeover.html

http://www.railforthevalley.com/latest-news/zweisystem/utterly-ignorant-about-transit-come-to-vancouver-and-join-the-club

http://www.railforthevalley.com/latest-news/zweisystem/adios-skytrain-bombardier-is-selling-off-its-rail-division/