[1] Partially owing to the decline of the streetcar system, the IRC declared bankruptcy in 1947 and transferred its assets to the newly formed Niagara Frontier Transit System (later the Niagara Frontier Transportation Authority), shutting down the streetcar network in 1950.

On July 1, 1950, the remaining streetcar lines in both Buffalo and Niagara Falls, NY, ended, also replaced by buses.

Within the same year, the Niagara Frontier Transit (NFT) took over all remaining IRC operations.

In 1974, NFT and Grand Island Rapid Transit were merged into a public Corporation, named the Niagara Frontier Transportation Authority (NFTA).

They IRC also offered service in a number of other localities in Western New York and Southern Ontario.

After the first decade of the 1900s, the International Railway Company began assigning numbers to their services, in addition to the naming of the route according to the primary street(s) the car travelled on.

In addition to Shelton Square being the origination point for the Grant, Niagara, and Elmwood streetcar lines, there were also a number of routes that passed through Shelton Square to continue either south towards the docks and harbor, or north toward the northeast sections of the city.

(pay as you enter) entrance, starting the policy shift of Buffalo area streetcars to operate with a one-person crew.

Limousine service had not quite become readily available when dignitaries came to visit the area, and the International Railway Company had cars specifically for that purpose.