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Tag Archives: Robert Cervero

Making Room for a Planet of Transit Metropolises

03 Saturday Jan 2015

Posted by Lerman in Planning, Transportation, Urbanism

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Robert Cervero, Shlomo Angel

I ran into two short clips by Robert Cervero and Shlomo (Solly) Angel addressing a few key subjects in the current state of world urbanization. Cervero deals mainly with transit and its power to shape cities in an efficient way, while Angel talks about the coming urban expansion of rapidly urbanizing ares, mainly in the Global South. Combining their insights on urbanization processes one can conclude that expanding cities should take the path of coupling transit and land-use planning while reserving the public rights-of-way needed to accomplish this. And now for the details.

Robert Cervero is an expert on transit and especially on Transit-Oriented-Development (TOD). He has also written the still relevant book The Transit Metropolis where he made observations on several metro areas and their transit innovations. In the short talk below, Cervero goes into detail about the way transit can transform cities. He puts emphasis on integration of public transit and land-use – i.e. dense developments should follow the accessibility provided by the transit systems. Among the more prominent examples that Cervero lays out are Copenhagen’s Finger Plan of 1947, Stockholm’s post-war similar expansion and the Hong Kong’s Mass Transit Railway (MTR) which is quite profitable due to its use of extensive real estate developments above its rail stations. Towards the end of his talk, Cervero mentions that with the invention of BRT (Bus-Rapid-Transit), which the city of Curitiba is famously known for, it is possible to reap the benefits of transit and land-use integration at a much cheaper capital expense than previously thought.

Shlomo Angel has led a significant research effort on world urbanization, which he summarized in his recent book, Planet of Cities. He calls for a paradigm of Making Room, i.e. accepting the fact that rapidly urbanizing metropolitan areas are bound for an explosive land growth, at a much higher rate than their population would grow, while urban densities are destined to decline. He distinguishes between western efforts to contain urban sprawl in stabilized metropolitan areas (many of which sprawled along car dependent suburbanism in the 20th century) and the up and coming metros of the Global South. However, Angel does not mean that a laissez-faire approach is appropriate. As an example he provides Bangkok, which grew in a massive way in the last three decades while staying affordable, but did not secure any arterial rights-of-way and trunk infrastructure leading to an infrastructure disaster.

Angel calls for securing arterial roads of 25-30m width, at distances upto 1km from each other (so people can walk to future public transit on them). This provision should be done ahead of urban growth and can be done also in advance of slum creation/invasion. This was done many times in the city of Lima, resulting in slums capable of relatively smooth improvements over time. As an examples for work on urban expansion in the Global South Angel points to Ahmadabad in India and a few projects he is involved with in Ethiopia and Colombia.

To conclude, Angel’s realistic city expansion plans should be combined with Cervero’s integrated transit-land use planning recommendations, so our still urbanizing planet follow the efficient path of transit metropolises.

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