Sean O'Brien, General President, International Brotherhood of Teamsters, speaks to media as picketing rail workers gather at the CPKC headquarters in Calgary, Alta., Friday, Aug. 23, 2024.(Jeff McIntosh /The Canadian Press via AP)

Teamsters Canada Rail Conference members picket outside the CPKC headquarters in Calgary, Alta., Friday, Aug. 23, 2024.(Jeff McIntosh /The Canadian Press via AP)

Teamsters Canada Rail Conference picket sign lean up againts a CPKC logo outside the company's headquarters in Calgary, Alta., Friday, Aug. 23, 2024.(Jeff McIntosh /The Canadian Press via AP)

Francois Laporte, National President, Teamsters Canada, speaks to media as picketing rail workers gather at the CPKC headquarters in Calgary, Alta., Friday, Aug. 23, 2024.(Jeff McIntosh /The Canadian Press via AP)

Francois Laporte, National President, Teamsters Canada, speaks to media as picketing rail workers gather at the CPKC headquarters in Calgary, Alta., Friday, Aug. 23, 2024.(Jeff McIntosh /The Canadian Press via AP)

Train cars are seen on the tracks in an aerial view at Canadian National Rail's Thornton Yard as the Port Mann Bridge spans the Fraser River and trucks transport cargo containers on the highway in Surrey, British Columbia, Canada, Thursday, Aug. 22, 2024. (Darryl Dyck/The Canadian Press via AP)