In terms of previous investigations, we have looked at the marshalling of different loaded tank cars and positioning within the train. Any separation between the more dangerous cars is a good thing.
You're probably aware that we have an active recommendation looking at the factors and the severity of derailments involving dangerous goods. Within that analysis, we're asking the railway industry and Transport to look at the risk profiles of various trains to determine whether there should be adjustments to the rules respecting the key trains and key routes. That's a very important aspect. Any train carrying more than 20 loaded cars is defined as a key train. Distribution within the train is quite important.
You bring up a very good factor, in terms of where the buffer cars are located.