- More than 2 hours: 10%There are breakdowns by age and gender, but not by urban/suburban, etc. The only clue the poll gives of geography is that the "audience" was Los Angeles, CA. So that may skew the results in terms of applicability nationwide, but since LA is largely a suburban megalopolis, this may be a fairly good reflection of what suburban commuting patterns are like in major metropolitan areas. This is not a scientific survey, of course, but I think the results are telling.
- 1 to 2 hours: 31%
- 30 minutes to an hour: 28%
- Less than 30 minutes: 23%
- None: 9%
I also just came across Walk Score (HT: Life Is Ministry - thanks, Matthew!). Walk Score is a site that calculates how walkable your neighborhood community is, based on how pedestrian-friendly the street layout is, the proximity to parks and public space, access to community institutions, etc. Go to Walk Score, plug in your address and see how your neighborhood does.
My neighborhood ranked as 54 out of 100, which is "Some Walkable Locations: Some stores and amenities are within walking distance, but many everyday trips still require a bike, public transportation, or car." Oddly enough, our previous home just two blocks away gets a score of 57. The apartment one suburb over where we lived when we first got married is 55. The neighborhood where I grew up in the suburbs of Minneapolis is 29. I remember walking quite a lot there, but that was primarily before I was old enough to drive. (Walk Score also lets you score some celebrity homes, like Bill Gates's house , the White House  and Jennifer Aniston and Brad Pitt's pre-breakup house . One of the most iconic suburban homes, the Brady Bunch house, gets a very walkable 80.)
Here are Walk Score's comments about why walking matters:
Walkable neighborhoods offer surprising benefits to our health, the environment, and our communities.
Better health: A study in Washington State found that the average resident of a pedestrian-friendly neighborhood weighs 7 pounds less than someone who lives in a sprawling neighborhood1. Residents of walkable neighborhoods drive less and suffer fewer car accidents, a leading cause of death between the ages of 15 - 45.
Reduction in greenhouse gas: Cars are a leading cause of global warming. Your feet are zero pollution transportation machines.
More transportation options: Compact neighborhoods tend to have higher population density, which leads to more public transportation options and bicycle infrastructure. Not only is taking the bus cheaper than driving, but riding a bus is ten times safer than driving a car2!
Increased social capital: Walking increases social capital by promoting face-to-face interaction with your neighbors. Studies have shown that for each 10 minutes a person spends in a daily car commute, time spent in community activities falls by 10 percent3.
Stronger local businesses: Dense, walkable neighborhoods provide local businesses with the foot traffic they need to thrive. It's easier for pedestrians to shop at many stores on one trip, since they don't need to drive between destinations.