Pipeline and Seaway options for Canadian export capacity

Would Canada benefit more from a transcontinental oil pipeline to the Maritimes or a post-Panamax expansion of the St. Lawrence Seaway?

Both have value: the pipeline is the stronger dedicated oil route, while Seaway expansion improves wider maritime access, and neither is a quick project.

A pipeline to the Maritimes could move oil efficiently and release railway capacity otherwise used by tanker trains. The railway alternative depends on spare capacity and the costs of maintaining the existing routes. Slow-running orders can preserve some rail service when track condition deteriorates, while reduced pipeline pressure can also keep oil moving through a damaged but uncompromised section. Both systems depend on maintenance, and the comparison includes derailments and operating practices as railway risks. Expanding the St. Lawrence Seaway would serve broader trade by improving access to Canada's internal market. Both projects are judged to require at least a decade.