Last week, we

But will we take action?

For part two of this series, we bring you some inspiration to get your creative juices flowing: transportation projects from around the world where a community's collective desire for well-designed and healthy urban environments lead to creative transformations of freeways.

From

Seoul: A river reemerges as a new Main Street

In the 1950s, Seoul city officials began a 22-year project to cover the Cheonggyechen River, replacing the open waterway downtown with a 12-lane-wide system of local roads and the elevated Cheonggye Freeway. Within 20 years of the project's completion, however, Seoul decided to set itself on a new path that would improve residents' quality of life and make the city more attractive.

The idea to bring back the Cheonggyecheon earned massive public support (79 percent in favor, according to one study), and in 2005 the Cheonggyecheon River took a breath of fresh air for the first time in decades. Today, it is the new Main Street of the city -- a stunning 3.6-mile long linear park dotted with art installations, a museum, a wetland restoration area, and tributes to the river's past. The project provides pedestrians with river access and the city a renewed public space.

Obsolescence and underuse, two of the primary motivators of other freeway downsizing projects, weren't factors in Seoul. Before it was dismantled, the Cheonggye Freeway remained a vital automobile carrier, with traffic estimates of up to 168,000 cars per day (I-375

There is no doubt that the removal of the freeway was at first unthinkable to some. To ease the pain of transition, the city launched a bus rapid transit line before closures began with promises to further strengthen public transit alternatives. Today, motivated by the necessity to create both a unified urban fabric and efficient ways to move through it, Seoul is home to a breathtaking riverfront park and one of the most comprehensive transit systems in the world.

Seoul's Cheonggye Freeway reimagined

Before photo credit

After photo credit

Paris: From belching buses to beachfront promenade





Paris-Plages reimagined Paris in the summer can be dreadfully hot and humid, and for those unable to escape to the seaside for a reprieve, the Paris-Plages is a welcome urban oasis. Initiated by Mayor Bertrand Delanoe in 2002, the now annual month-long closure of the Pompidou Expressway, which runs along valuable Seine riverfront, means trucks filled with sand, palm trees, and beach chairs unload their cargo so Parisians and tourists can relax in the transformed freeway. In 2007, an estimated 4 million visitors to the Paris-Plages enjoyed free concerts, a floating swimming pool, and waterfront cafes, and it the closure has since spread to three locations. In 2012, Delanoe announced plans to close the Pompidou permanently with the intent of "giving Parisians more opportunities for happiness."

Before photo credit

After photo credit

Portland: Residents put their feet down

Portlanders took it one step further. The 1942 completion of Harbor Drive fragmented Portland's city center, and a 1968 proposal to further widen the roadway was the last straw for many residents who saw an opportunity to create a brighter, greener future. In 1968, Portland residents formed the Riverfront for People coalition to demand complete removal of the freeway. Traffic engineers said it was impossible, but that didn't stop Riverfront for People. Their advocacy earned the support of Gov. Tom McCall and his newly formed citizen advisory committee, and in 1978, Harbor Drive was removed. Today, a 37-acre waterfront park has taken the place of the freeway.

The project is seen as a catalyst that shifted Portland towards more pedestrian- and transit-centric development policies. The park transformed the appearance and character of Portland and serves as a reminder of the power of residents to demand and realise the future they desire.

Portland's Harbor Drive reimagined

Before image credit

After photo credit Rob Lambert,

Germany: Millions flood autobahn for unfamiliar festival

In 2010, the European Union designated Germany's Ruhr region as

Autobahn reimagined

Before photo credit

After photo credit

By now your imagination should be running wild with possibilities for reinventing I-375. So what is it you're picturing? How can I-375 represent progress for Detroit? In your dream, is I-375 still a six-lane highway, or has it been transformed into something else?

Main photo credit