Mexico City

In 2007, Mexico City's government promised that it would build 300km of bike lanes around the city by 2012. According to Jimena Veloz, "the city still only has 22.2 km because most money is allocated to car infrastructure."

In the dense center of Mexico City, an architect has proposed a 65-story building - straight down.

Two architects submit a plan to Mexico City planners that includes bringing the Río Piedad back to life and revitalizing the city with green public spaces along its waters.

Metro stations, train stations and streetcar systems have distinct ways of showing how to get from one area to another. TheCityFix's Jonna McKone looks at mass transit systems from Mexico City to Paris and the visual representations used in each one.

Garrett Bradford of TheCityFix reviews some of the most innovative and sustainable transit systems from around the globe that made their debut over the last twelve months.

Frequent street closures due to unregulated protest -- up to about 7 per day -- clog the streets of Mexico City, leaving some hungry for a more active response from the government.

Safety is a major concern for the world's women on a day-to-day basis. From riding the bus to walking at night, if women don't feel safe, they won't do it. Cities need to take a more active role in addressing this challenge, according to this post.

Mexico City has opened a citywide bike sharing system, similar to those in Paris and Barcelona.

Atlantic correspondent Cristine Russell takes a look at Mexico City's quickly-implemented bus rapid transit system.

Mexico City's Centro Historico is undergoing a broad redevelopment, which has resulted in more investment, more events, and more use. However, some there are worried that increased commercialization will tarnish the public square.

Among the installations at the Ecological Urbanism exhibit at Harvard's Graduate School of Design is a collection of smells from 200 Mexico City neighborhoods.

Once a week, car-flooded streets convert into bike- and pedestrian-flooded public parks in crowded Mexico City.

Air pollution is so bad in Mexico City that residents have less sensitivity to smells, according to a recent study.

With one of the world's higher rates of air pollution, Mexico City is cracking down on one type of emission: cigarette smoke. Smoking has been banned in all public places in the city, including office buildings and restaurants.

A look at the similarities between Los Angeles and Mexico City.