Something about Canadian Geese

On my daily commute to school with Abigail we run across an area that is habitat to several Canadian geese. On more than one occasion we'll see the geese making a slow, waddling trek across the street to the grass on the other side. Around this time of year, often the crossing involves their newly born chicks; complicating the crossing dilemma. Needless to say, the traffic gets backed up. Regardless of the time of year, or baby situation, it seems these geese, in this area, cross the street -- and don't fly. So, Abby asked today "Why don't they just fly across the street Daddy?". And well, I have no answer for that. Until now. Canadian Geese are among a rare group of animals (about 10%) that mate for life (like wolves, penguins, beavers or vultures). The parade ritual of leading a family, bookended by mother and father. Though the Canada Goose is a migratory bird, a growing number of them have been found to stay put -- mainly in golf courses or urban parks -- turning them into a "pest" (to stupid people). The crossing, and not flying, makes sense, when the gosling's are involved, but why -- this morning -- did we see a single goose cross an insanely busy intersection and not simply fly across? So far, I can't find the answer -- other than laziness. If anyone has a better answer, I'd LOVE to hear it.