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Higher densities not necessarily the answer to our sustainability questions

When one thinks of sprawl the first thought that comes to mind is the spread out, low-density suburbs that have eaten away at our nation’s fertile farmland and natural environment. An immediate reaction is that density is in fact better, but is this so?

There is an assumption made that density would somehow reduce the amount of land needed for sprawling suburbs, and that greater amounts of land can be preserved. This is true in theory, but does not always happen once the market has its way. Furthermore, preserved land is not the same land it once was; meaning that the preserved “greenway” connecting your neighborhood to another community feature may or may not be beneficial to the natural systems that exist. Does it serve as a corridor for wildlife, is it farmable or is the preserved land serving any significant purpose outside of additional trees that are reducing the amount of CO2 in our atmosphere? Most likely not.

What has happened in Atlanta is something that should be learned from. Atlanta is arguably the king of sprawl in modern day America, but some might say, well Fulton County has a higher population density than does Hamilton County. Similar arguments can be applied to other less urban regions than Cincinnati. The fact is that Fulton County is just about built out with the exception of some land in the far southern reaches of the county. Furthermore, this built-out county has extraordinarily dense suburban areas including the central Perimeter area which includes 30 story office towers, residential towers and 12 lane highway systems to boot. The traffic is abysmal like much of the rest of Atlanta and the problem is only going to get worse.

Midtown, Buckhead and Perimeter skylines in Atlanta – photo from mattsal88 on ImageShack

The reason is a combination of densities and form. The suburban areas of Atlanta, and even much of the urban areas, are almost entirely car-dependent. So a low-density suburban area that is car-dependent is one thing, but a high-density area of the same makeup is nightmarish. The “spatial mismatch” is exacerbated to a degree seen nowhere else in America than Atlanta and Los Angeles (Los Angeles County is the most populated county in the country at 9+ million). The people living in one area are working in another creating a spatial mismatch that is exacerbated by the high densities. They are not walking, biking or taking transit to a level enough that would offset its densities.

When you hear of the next “new urbanist” neighborhood on the fringes of a metropolitan area, or the next lifestyle center that pitches itself as being the next best thing to an authentic urban shopping experience, be wary. These are not real communities where store owners live in addition to running their business. The residents are most likely hopping in their car that is parked nicely within one of their two (or more) dedicated parking spaces and driving into the center city for work.

Higher densities in our suburban areas are not the answers to our sprawl issues. A correction of the spatial mismatch is what’s needed to truly create a sustainable metropolitan area. Natural systems need to be preserved in their truest form and our most fertile food-producing regions need to be maintained for their highest and best use. Higher densities in the core with high density satellite neighborhoods connected by high-quality transit options are the best possible solutions.

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Nola tearing down the elevated I-10 over Claiborne?

Tearing down a major interstate highway through the heart of a major metropolitan area sounds crazy right? Wrong. Past case studies have shown that this has been done in places like San Francisco, Milwaukee and Portland, and has resulted in higher qualities of life and with little to no harm caused to driving times.

This topic is always a popular one with those in the Urban Planning/Design profession, and with a new planning interest in New Orleans post-Katrina the recipe might be just right for the demolition of Interstate 10 through the Treme neighborhood. Like many urban neighborhoods of the early to mid 20th Century, Treme was a once vibrant, unique and local that centered around its grand North Claiborne Avenue. What happened was the injection of the interstate system that plowed through Treme like many other neighborhoods including Cincinnati’s West End and downtown area.

The transition in Claiborne was even more intense as a grand boulevard was replaced by an elevated highway which facilitated the downward spiral of the neighborhood. Many older Nola residents remember North Claiborne Avenue as being the “black people’s Canal Street.” This is important as French Quarter activists were able to block a highway from tearing through their neighborhood which left the Treme neighborhood vulnerable to the interstate system’s wrath…and with that North Claiborne Avenue was gone.

North Claiborne Avenue in 1966 (left) and 2009 (right) – Source and Source

As with many urban neighborhoods across America, Treme is redeveloping and becoming attractive to residents once again. One problem though is that I-10 has caused lower property values and interest for those properties within its immediate vicinity (the exact opposite effect of transit service).

As Nola moves forward with its potential plans to tear down I-10 through Treme (area map), what can be learned? In addition to past examples (listed above) cities like Chattanooga, Buffalo, Seattle and Trenton are all considering the option of tearing out highways through their cities.

Cincinnati narrowed and buried its Fort Washington Way that connects I-71 with I-75 through the heart of downtown and its riverfront property, but could this have instead been removed with traffic instead utilizing the underused Central Parkway and Liberty Street, or even connecting via I-275? What about the Norwood Lateral that ate up the right-of-way that had been preserved for Cincinnati’s planned subway system?

These are important questions as Cincinnati examines how it is going to handle the $1 billion reconstruction of the Brent Spence Bridge, $1 billion reconstruction of I-75 through the Mill Creek Valley and considers the options of upgrading US 50 West to highway status via the 6th Street Expressway through Queensgate, and even possibly extending I-74 east through the city and its eastern suburbs so that it could eventually connect to Washington D.C. per the original Interstate Highway Plan – both of which present untold hundreds of millions (potentially billions) of dollars of public expense.

Are we going to continue to move forward with an antiquated view of transportation planning straight out of the Robert Moses playbook, or will Cincinnati too start to re-examine how it goes about planning for its city and its residents that make it special?

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The differences are striking

On Saturday I pointed out some differences between where Seattle and Cincinnati are in terms of building their cities to be attractive to the next generation workforce. The differences are just so striking today.

In the Cincinnati Enquirer, the editorial staff ran a piece outlining why they think the Cincinnati Streetcar is too bold of a plan. One that isn’t necessarily a bad plan, but one too big for Cincinnatians to undertake during an economy such as this.

At the same time, the Seattle Times has been celebrating the opening of Seattle’s new light rail system. You’ll notice many people wearing bright green uniforms/shirts that nearly 70,000 people wore to Qwest Field on their way to the Seattle Sounders FC vs. Chelsea FC soccer match.

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The High Line (update)

A few weeks back, I wrote about a brand new park in New York City called the High Line. It is a converted elevated railway line that they turned into a park.

Pepsi has apparently decided to use this park as one of the faces of the Good Works portion of their Refresh Everything campaign. Seems fitting enough. Think they’d be willing to finance help any refreshing projects here in the 513? The Cincinnati Streetcar maybe? I’d be willing to let them poster one of the streetcars with a gigantic Pepsi logo on it, for the right price. Not that I make those calls. Or maybe they could do something to refresh the failure know as the Skywalk.

Below, see a short video on how the park interfaces with the existing infrastructure.

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The keys to revitalizing Washington D.C.’s Columbia Heights

Special thanks to Kaid Benfield for pointing out this great video on Washington D.C.’s Columbia Heights neighborhood that is revitalizing itself in a green way. The revitalization efforts are focusing on the following key elements: landscape, streetscape, transit options and mixed uses, and sense of place.

Some places are building great cities and great neighborhoods, are we?