Walk Appeal promises to be a major new tool for understanding and building walkable places, and it explains several things that were heretofore either contradictory or mysterious. It begins with the assertion that the quarter-mile radius (or 5-minute walk,) which has been held up for a century as the distance Americans will walk before driving, is actually a myth.
Both images below are at the same scale, and the yellow dashed line is a quarter-mile radius. On the left is a power center. As we all know, if you’re at Best Buy and need to pick something up at Old Navy, there’s no way you’re walking from one store to another. Instead, you get in your car and drive as close as possible to the Old Navy front door. You’ll even wait for a parking space to open up instead of driving to an open space just a few spaces away… not because you’re lazy, but because it’s such a terrible walking experience.
The image on the right is Rome. The circles are centered on the Piazza del Popolo (North is to the left) and the Green radius goes through the Vittorio Emanuele on the right. People regularly walk that far and then keep on walking without ever thinking of driving.
The London standard - 2 miles
Like Rome, the world’s great cities have streets that are so good that you’ll happily walk for miles. For convenience, I’ve set a two-mile radius for the London Standard, which was so named because I presented it for the first time in London. But it could just as easily have been the Paris Standard, the Florence Standard, or… you get the idea. Europeans are reputed to walk much further than Americans, and for this reason: their streets have much better Walk Appeal. Put a Parisian accustomed to walking five miles or more per day on a suburban American cul-de-sac, and they wouldn’t walk much, either!
The T5 standard - 3/4 mile
People will walk about 3/4 of a mile on a good American Main Street. Or to be more precise, this is Transect Zone T5. Good T5 streets pull buildings right up to the sidewalk, and most of the buildings are fairly narrow because real estate is usually expensive in T5. Narrow storefronts change the walkers’ view frequently, which is more entertaining than long blank walls or long stretches of the same building. New Urbanists from Australia have for years been advocating for a “elongated pedestrian shed” along Main Streets or High Streets. Walk Appeal shows precisely why they’e been right all this time.
The T4 standard - 1/4 mile
A good street in a traditional neighborhood is where the 1/4-mile walking radius is actually accurate. The buildings aren’t right up on the sidewalk like they are in T5, so it takes a few more seconds of walking for your view to change substantially. Fences, hedges, and frontage walls all increase Walk Appeal in T4 because they’re right beside the sidewalk, where the view changes fastest. They also make people feel more comfortable sitting on the porches, so they’re more likely to get acquainted with people walking by, as we discussed here.
The T3 standard - 1/10 mile
The subdivision standard - 250 feet
The power center standard - 100 feet
The parking-backed standard - 25 feet???
Full Story: Walk Appeal
Source: Better! Cities & Towns, July 25, 2012