Historical Map: Homeward Passenger Movement During the Evening Rush Period, Toronto, 1915
Beautiful diagram indicating the patterns of homeward peak-hour travel via public transportation (at this time, mainly streetcar) in Toronto. By my rough count, the collection of yellow dots in the downtown area represents some 49,500 people.
Of particular interest are the red-and-white hatched dots, which represent a point where passengers transfer from the privately-run Toronto Railway Company’s (TRC) streetcars to those of the city-owned Toronto Civic Railways. Due to a disagreement over the terms of the franchise, the TRC refused to offer streetcar service in newly-annexed portions of Toronto, forcing the city to create its own service in those areas. In 1921, the TRC’s franchise expired and all transit was consolidated under the new Toronto Transportation Commission, the forerunner to today’s Toronto Transit Commission.
If you look closely (click on the image to be taken to a much larger version of the map), you can see that ridership totals are also shown for the civic railways, just in a fine black hatching instead of the more prominent blue used for the services branching out of the downtown area.
Visually quite similar to this map of the morning peak flow on the New York City subway in 1954.
(Source: Toronto Transit Alliance)