I agree entirely with Paul: it will depend on the legislation that will be passed and its noise-level provisions. By setting out standards similar to the WHO's on allowable decibel levels by day and by night in the legislation, the rail company will have 30 days within which to comply, which would be given by the Canadian Transportation Agency.
By accepting the concept of unreasonable noise — which is a rather weak concept — or the least unreasonable possible, all operations would have to cease at night, particularly between the months of May and September, so that people can open their windows. If we set out the World Health Organization's standards in the legislation, it would be up to the railway company to find solutions.