Right now, 46 percent of trips from predominantly single-family-home suburban neighborhoods are three miles or less. Which would be perfectly fine for a bike ride, a scooter ride, or a walk in many of those trips, if there was adequate infrastructure to make that a safe choice. That would have enormous impact.
This is a problem that New Urbanist designs hope to solve by placing necessary goods and services within a fifteen minute walk from residences. This means that housing is within slightly less than a mile from important destinations.
Even at this shorter distance, how many Americans would rather drive? Factor in different circumstances – weather, the purpose of the trip (buying groceries?), who is involved in the walk (a solitary pedestrian versus a family with small kids), and the American preference for driving in the suburbs – and this may just seem to be too far.
Stretching the radius from just less than a mile to three miles then is a significant change. A bicycle or scooter would certainly help. Local mass transit would help. But, this would require a lot of infrastructure. Helping pedestrians feel safe instead of unwanted guests alongside busy roads. Safer options for bicyclists. Denser land use. Planning that helps strategically place needed services and buildings where non-drivers can access them. A commitment to a slower-paced life where getting somewhere is part of the fun rather than an impediment to consumption.
It is maybe that last piece that I think may be the hardest to address. Retrofitting will be attractive in some places due to particular needs and dissatisfaction with sprawl. Indeed, “surban” settings will help some suburbs stand out from others. But, if it only happens in pieces across suburbia, it will be hard to address the bigger question: do Americans object to having their lives are designed around cars? They may not be happy with it but this is different than explicitly making individual or collective choices to try a different way of life. As of now, the American Dream still typically involves cars and vehicles and it may take a long time before alternative modes of transportation are viewed as desirable.