All airports are unique, and the characteristics of their traffic mix can vary. For example, in England, Gatwick has only one runway, but it handles predominately larger long-haul aircraft which typically carry more passengers per aircraft than the majority of aircraft operating out of Calgary International Airport (YYC). Calgary’s three existing runways are in what is known as an intersecting configuration – which is not as efficient as a parallel runway system. Out of the four busiest airports in Canada (Toronto, Vancouver, Montreal, and Calgary), Calgary is the only airport to manage its traffic without the benefit of an efficient parallel runway system.