That is a potential scenario, for sure, but it's to lessen that risk that we have focused on return-to-base vehicles and corridor vehicles. We're not, in the context of what we're doing now, looking at putting natural gas filling stations on every corner in the way gasoline filling stations exist today. If you're a return-to-base, you'll just do that. You'll return to base to get filled up, so you're talking about one installation. We already have fleets on the road that do that.
I'll take as an example the Windsor-Montreal corridor, or all the way to Quebec City, where there is an awful lot of heavy fleet traffic. If we do decide to go with infrastructure, you would strategically locate the infrastructure. It doesn't escape my notice that both marine and rail tend to follow that same corridor, so if and when other modes get to that same use of that product, maybe we would have a multiple gain for a limited infrastructure investment.
To respond to your question, we're not proposing a huge investment in infrastructure similar to the one we have now for gasoline or diesel, but there are challenges associated with the equation you create.