
Urban structure & arterials
First metropolitan-scale framework
The 1976 Plan Director for the Federal District of Mexico City, prepared under the Departamento del Distrito Federal, was the first comprehensive planning framework to address the capital at something approaching metropolitan scale. It set out an intended urban structure of centres and land-use zones organised around a hierarchy of arterial roads, including the ejes viales system of one-way arterials that restructured circulation across the city. The plan sought to bring order to explosive growth in one of the world's fastest-expanding metropolises.
As the first metropolitan-scale framework for Mexico City, the plan marks the moment when Latin America's largest urban agglomeration acquired a formal planning instrument, and its arterial logic still structures movement in the capital. It is also emblematic of the limits of master planning in rapidly urbanising contexts, since informal expansion beyond the Federal District's boundaries continued largely outside its reach, fuelling later debates on metropolitan governance.