Big changes are in store for some of Toronto's commuters.\nThe TTC is looking to replace some streetcars on two popular downtown routes with buses as a result of ongoing delays with the delivery of new streetcars from Bombardier.\nThe current fleet is struggling to handle the load given the unreliable state of the CLRV and ALRV models, some of which are pushing 40 years old. So starting on February 19, streetcar service on both the 505 Dundas and 506 Carlton routes will be replaced with buses.\nUnfortunately due to the cold weather and other factors, we have a streetcar shortage. Because of this the 505 and 506 are being replaced with buses during large portions of the day. There have been no route changes, but this change can cause unpredictability. Sorry.^RA🚀\n— TTC Customer Service (@TTChelps) January 3, 2018\nVia unsplash/@emilieseguin\nThe agency plans to move some of the cars from the 506 Carlton and 505 Dundas routes to more critical routes, such as 504 King, according to a spokesperson for the TTC.\nThe TTC's ridership numbers rank Carlton and Dundas as the eighth and 12th most used as of December 2016. And while buses have less carrying capacity than streetcars, the bottom line for the change is the need for new streetcars.\n"The old streetcars that we have today are failing and failing. They're just too old," TTC spokesperson Brad Ross said.\nAccording to the TTC, these replacements will be in place "until at least 2019."