In 1854-55 the Great Western Railway was completed though Port Credit and Clarkson, connecting Toronto and Hamilton. As a faster and more efficient form of transportation, railways were responsible for the economic development of export industries in the 1850’s and 1860’s. The railway allowed farmers, millers and local industries who were situated along the railroad to send their produce and goods to Toronto and beyond, resulting in the expansion of business.
Source: Heritage Mississauga, https://heritagemississauga.com/tracks-through-time/