Bicycle Deaths in New York Are a Problem. The Ghost Bikes Project Wants to Solve It.

Pop-ups, temporary constructions intended to enliven public places, can often be used as temporary structures and events as marketing tools, and as camouflage for their larger and less charming permanent developments. But young architects in London, their talent and energy outrunning their employment opportunities, initiate, design and build pop-ups as glimpses of what a better city – more open, more social, more pleasurable, more surprising – might be

A Dallas urban neighborhood was dilapidated with abandoned storefronts and offered no vitality for pedestrians. A group of artists and community members created Build a Better Block, in which local artisans and small businesses took over a vacant block and transformed it for a limited time to encourage the ingredients for more permanent urban renewal.

The Oak Cliff neighborhood in Dallas suffered from recession-closed businesses and crime. Then community members used placemaking, in which people shaped their own environment to improve the quality of life, and the concept of Build a Better Block, which was a pop-up event showcasing art, food, music, and local faire. The idea gives citizens a fresh look at the possibilities through which to transform the space in which they live, and it has attracted attention across the country and around the world.

Sweden's "Vision Zero" program has used a comprehensive approach to infrastructure and regulation to drastically reduce traffic-related deaths, making Swedish roads the safest in the world.

Conventional merchants are afraid to lose parking spaces to bike parking or bike lanes. New York and Portland are finding cyclists increase local economies, and spend more money too.

Paris is a city plagued by traffic jams and air pollution. In 2007, the local government created a public bicycle sharing program called Velib that has drastically reduced the number of cars on the roadways and parking lots. During five years, over a hundred million people have used the program and it has a quarter of a million subscribers.

Neighborhoods in Chicago suffer from gang violence and gun-related deaths. A church leader and a physician trained in infectious diseases created Cure Violence, a program that sends teams of local residents to meet with gang leaders as a means of producing positive behavioral change by re-setting social norms. Their approach has reduced violence between 40% and 70%.

Raton, a town once surrounded by eight coal mines, now has a main street of boarded-up buildings. There is reason for optimism as the town diversifies its local economy, betting on "a mix of small manufacturing businesses, health care and specialty services, and hospitality for travelers" to endure the sudden decline in mining revenue. Its calculated revitalization may hold lessons for other towns.

Memorials are being created at rapid rates these days, but they seem to lack a long-term effect on the public. The Chicago Torture Justice Memorials project seeks to change this pattern by putting out an international call for memorial proposals, wanting a variety in visions and a collective memorial, in order to remember the torture of black detainees and racialized police misconduct.

Alleys in Seattle were once places of illicit, illegal, and unsanitary activity. The International Sustainability Institute in Seattle began organizing music and art events to bring in people, which, in turn, cleaned-up the crime and garbage. As an urban development strategy, adjacent vacant storefronts re-opened for business and beautification could be seen in new gardens.