We do not have the authority to require tunnels over or under railways. As far as we are concerned, the regulation will increase the protection at railway crossings. However, if we see that the situation is not under control, we will take measures like reducing the speed of trains, or require them to whistle. In some cases, we can even compel them to stop at grade crossings so that an employee steps out to protect the train and the people while the train crosses the crossing. These are the kinds of measures that we suggest.
As for tunnels, I have once or twice seen situations where people were complaining that it was dangerous to use them at night. When I was working in the Quebec region, people contacted me. In the area of Notre-Dame-de-Grâce, people even wanted that a tunnel be closed because they considered it dangerous for the population.
In general, we try to work with the railway people in imposing measures that will make the situation safer. On the other hand, the regulations will impose new standards.