Over the past half century, government agencies in Mexico City have invested heavily in
high-capacity public transit, particularly the 225-km Metro system. Nearly all of this
investment has been in central locations of the metropolis. Only recently has service
coverage been extended into the periphery, which has accounted for the majority of postwar
metropolitan population growth. The Metro's Line B, which opened in phases in 1999 and
2000, significantly expanded Metro coverage into the densely populated and fast-growing …