I can answer in a few different ways. From a revenue perspective, airports make most of their money from passenger traffic, but here is where the economic development mandate that airports have as non-share capital corporations comes in. Cargo is tremendously important for many regions. Even though it may represent a little bit of revenue, it represents big dollars in terms of goods shipped. Atlantic Canada presents a good case. Shipping lobsters out of Nova Scotia and New Brunswick, for example, is tremendously important for the region.
When you get into the larger centres, it may be a little less obvious. I spoke to the role of light rail. We now have a light rail link that connects Toronto Pearson to downtown Union Station. There's one in Vancouver that's been in place for quite a few years, and other airports are working on it. Ottawa and Montreal have something coming, and it's in the long-term vision for Calgary and other airports.
What this does is, when we get people out of cars, whether they be travellers or workers, and onto transit to come into airports that way, it opens up space on the roads. Goods that need to be shipped by road have more capacity for shipment by road because more passengers have been displaced and are coming into the airport by rail.