"Appendix No. 4 - Schedule of Assumptions and Reversions of Sections of the King's Highway System for the Year 1935". Annual Report (Report). Department of Highways. March 31, 1935. p. 49. Retrieved February 3, 2021 – via Internet Archive.
Ministry of Transportation of Ontario. "The Thorold Tunnel". Government of Ontario. Archived from the original on July 25, 2014. Retrieved June 19, 2015.
Ministry of Transportation of Ontario. "The Thorold Tunnel". Government of Ontario. Archived from the original on July 25, 2014. Retrieved June 19, 2015.