Vehicles slow down and often need a push from the nearest Good Samaritan to get out of a rut. You begin to see people opting for the walk instead because it's safer and less hassle than car-defrosting rituals. They troop out in the middle of the street following the pioneering tire trails of that guy that owns the pickup truck. Everyone seems to slow down and shift their priority from getting there as fast as possible to getting there safely. People become people again, not drivers or sociopaths or whatever mindset we acquire behind the wheel (See Louis CK). You also see people outside just for fun. When I was a kid, snowbanks brought our neighbourhood together like nothing else. My family hasn't grown out of that. Here's Ryan and I having fun after a major snowfall with the GoPro and Spooner Board (to my brothers reading this, I'm bringing this home for you at Christmas - couldn't help testing it out first :P).
Here is my view from the sidewalk on the Monday after a big snow. I should note that by evening, the city had taken care of most of these snow barriers.