Decline of the Driver's License.
One reason why increasing walkability is so important is that few and fewer people even know how to drive.
“Among young adults, the declines are smaller but still significant—16.4 percent fewer 20-to-24-year-olds had licenses in 2014 than in 1983, 11 percent fewer 25-to-29-year-olds, 10.3 percent fewer 30-to-34-year-olds, and 7.4 percent fewer 35-to-39-year-olds. ”