That evidence is with Transport Canada. Basically, they collected the information from class I railways, CN and CPKC, during the last two pilot projects.
Essentially, the experience of these two pilots shows that the traffic is an interchange with a U.S. railway. That traffic then moves to the U.S. The train that moves to the U.S. doesn't move in Canada. It is not moved by Canadian employers, and that traffic is not handled at Canadian ports. Everything essentially happens in the U.S.