Public Space is a place for community as well as a topic for discourse between designers and patrons. This duality may be seen in our most recent entrance wall installation, a parametric sculpture inspired by conceptual harmonies between two- and three-dimensional media and reflecting the tension between an evolving community and a static installation in… Read more »
Cities today are mostly car-centric landscapes. Sidewalks place pedestrians directly beside exhaust-spewing vehicles with little to no buffer. High-speed thoroughfares or highways often dissect neighborhoods and lack appropriate pedestrian or bicycle infrastructure. These conditions are seen in cities around the globe; however, some cities are finding opportunities to reintroduce car-free zones that give the streets… Read more »
Cities today are mostly car-centric landscapes. Sidewalks place pedestrians directly beside exhaust-spewing vehicles with little to no buffer. High-speed thoroughfares or highways often dissect neighborhoods and lack appropriate pedestrian or bicycle infrastructure. These conditions are seen in cities around the globe; however, some cities are finding opportunities to reintroduce car-free zones that give the streets back to the people. Strøget in Copenhagen has set a standard as a successful and charming pedestrian-only throughway, and cities like San Francisco, New York and Los Angeles have been taking steps to follow the example.
As designers of urban space, we want to know what makes these inspiring auto-excluding endeavors a success. Here we take a brief look at some examples and offer five tips for city officials, developers, designers and community members to consider when pursuing car-free spaces for their own communities.
Strøget, Copenhagen, Denmark
The Strøget, possibly one of the most well-known examples of a successful zone, originated when Copenhagen experimented with this concept throughout the 1950’s by closing the four-block area to cars for two days during the Christmas holidays. In 1962, without public announcement or input, the road remained closed. Like many movements to eliminate cars, this was controversial, and it took time for people to see the benefits. The original opposition to shutting down this street is the same as the arguments that come up today:
- Shoppers would forget or not go to local stores without the opportunity to drive by them.
- Traffic would become congested on surrounding streets of the car-free zone.
- The local community would not be interested in gathering in these public spaces.
Copenhagen’s worries were assuaged as the car-free area became one of the top destinations for shoppers and tourists. Local businesses found their sales rising by 25-40%. It catalyzed the economy of surrounding areas and helped define the walking and biking culture that has helped earn Copenhagen the title of 2013’s most livable city.
San Francisco, New York, Los Angeles
Going “car-free” isn’t solely reliant on adjacent retail spaces. Since 1967, San Francisco has made the eastern half of JFK Drive car-free on Sundays. This street, which goes through Golden Gate Park attracts droves of cyclists, runners, stroller-pushing parents, rollerbladers and dog walkers to the park and greatly increases park use.
Similarly, in New York City, Mayor Bloomberg temporarily shut down vehicular access to a street extending through Central Park. It experienced such a success that after six months, the pedestrian- and bike-only mandate was extended indefinitely. In another example, on three separate Saturdays, seven miles of streets—stretching from the Brooklyn Bridge up to Central Park along Park Avenue—were closed to cars and opened to the public. A reported 250,000 people enjoyed live music, fitness classes, rock climbing, and an interactive sound and light installation in the Park Avenue tunnel.
Cities have become urban-design testing grounds for new types of public space and planning. Pop-up car-free zones range from small scale parklets (San Francisco’s parklet program) to a one to two-block interventions like the Sunset Triangle in Los Angeles. Temporary street closures like farmer’s markets, neighborhood concerts and CicLAvia have helped Los Angeles prove that car-free zones work. CicLAvia originated from the “Ciclovia,” event in Bogota, Columbia, during which major city streets are closed temporarily and opened to cyclists and the public. Los Angeles has held five CicLAvia events in the last three years. With each iteration participation from street vendors, performers and the public increases. It is also experimenting with different scaled street closures – in April 2013, CicLAvia closed approximately 15 miles of streets, from City Hall to the ocean, and attracted more than 100,000 cyclists.
5 Tips for Going Car-Free
Permanent or temporary, success in car-free zones is hardly a guarantee. In our view, going car free requires a delicate balance of five essential ingredients:
- Pedestrians are already there –
If people aren’t already using the area for shopping, recreation or other needs, they aren’t going to start just because it’s free of exhaust. Cities can’t rely on “car-free” kitsch to be the draw. In China’s Gubei district there are 937 persons per hectare – making it ideal for a project like Gubei Pedestrian Promenade, a large scale pedestrian-only throughway. Three blocks were closed to vehicular traffic to create three distinct zones that attracted recreation, socializing, shopping and dining for the surrounding residents. While density can help drive a need, it is important to look at whether there is a lack of surrounding open space for people to gather, as was also the case in Gubei.
- The street is not currently essential to the city’s street grid –
Diverting cars from formerly congested areas can actually improve the flow of traffic in the surrounding areas. New York’s Times Square, was one of the most congested places in the world and successfully went car-free in 2010. When closed off the surrounding streets absorbed the flow and people made different decisions about how they got to Times Square whether it be walking, biking or taking public transit.
- Community Input to programming the site –
Local residents, businesses, employees, and the surrounding community members are instrumental to any car-free event or development. Street food vendors, kiosks, street performers, artists and more are needed to bring the spaces to life. Temporary closures are no different. The one-day CicLAvia events have food trucks, a Korean BBQ cook offs, film screenings, and other activities along the route.
- The latest CicLAvia event in Los Angeles engaged more than 100,000 cyclists and other participants.
- A unique regional presence/destination –The place itself needs to be a destination, whether it’s a throughway in a major city park or a desirable retail development in a unique environment. Lewis Avenue Corridor in Las Vegas, Nevada took an underutilized alley and parking lot and transformed it into a linear urban park. The design is derived from the natural pattern that desert washes create in the landscape after years of seasonal rainfall. It connects the new Regional Justice Center and U.S. Federal Courhouse in the downtown core and gives a continuous canopy of shade. For people north of the Las Vegas Strip who work and live in the city, it acts as a hub for gathering and events and has carved out an identity based on pedestrian sensibilities.
- Scale matters –
In the 1970’s, Chicago turned nine downtown blocks of State Street into a pedestrian and bus only zone. While being highly trafficked, thewide street left pedestrians feeling isolated and vulnerable. The negative effects of these poor proportions were compounded by exhaust from passing buses and a downturn in the economy. In 1996, Mayor Daley reintroduced vehicular traffic. This example shows that the volume of pedestrian traffic needs to be in line with how the space interacts with the surrounding context. This begins with an adjustment to sidewalk widths by adding benches or plantings to tighten the space. The right proportion not only puts the pedestrian at ease, it allows the place to buzz with activity.
As cities continue to evolve, we are seeing how car-free spaces can help provide economic, social and health benefits alongside traditional street infrastructure. Learning from past and present examples, we can successfully use these five tips to reorient our neighborhoods towards people as opposed to their cars.
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What does it take to create a new link within an existing community? For our Houston designers, they have been hard at work for more than the past decade in creating a city-wide green system of Bayous and pedestrian trails for environmental—as well as social—good. And now, the famed Buffalo Bayou is getting another pedestrian… Read more »
What does it take to create a new link within an existing community? For our Houston designers, they have been hard at work for more than the past decade in creating a city-wide green system of Bayous and pedestrian trails for environmental—as well as social—good. And now, the famed Buffalo Bayou is getting another pedestrian bridge. In addition to creating ways to mitigate the wet landscape of this urban area, the park features a series of five bridges that cross the Bayou and connect neighborhoods together. The first pedestrian bridge over Buffalo Bayou was built at the Hobby Convention Center back in 2005 as part of the Buffalo Bayou Promenade. The Rosemont Bridge was built next in 2009 and opened in 2010 to great success.
Today, we spoke with Tim Peterson, Kevin Shanley, Josh Lock, and Scott McCready as they take us behind-the-scenes of the next bridge as it goes up between the Houston Heights and Montrose neighborhoods in Houston.
What’s the name of this next bridge and where is it located?
The Jackson Hill Bridge spans Buffalo Bayou just west of Waugh Drive. Construction is slated to be finished by Fall 2013 and the bridge will be open to the public at that time.
How big is it?
345 Linear feet.
What is it made out of?
Weathering steel truss bridge with pressure treated pine deck.
What is remarkable about the construction process for this bridge?
The bridge is being delivered in six sections and will be bolted together in sections of two and lifted into place. The clear span across the bayou from column to column stretches 150’. Galvanized guardrails are being fabricated along with the galvanized column pylons which will extrude an additional 15’ above the bridge deck and will be internally illuminated. The lighting will shine through a pattern that will be cut into the steel pylon surfaces. The pattern represents the changing appearance of the moon during the lunar cycle. Phase 2 work includes reforestation tree planting that will be installed in the areas where vegetation was cleared to make room for the bridge construction.
Here, they show us how it works — just how, exactly, this new bridge comes to be in its new home:
The Jackson Hill Bridge is located at Waugh and Buffalo Bayou. Before construction started, the site was cleared to accommodate the crane and required machinery.
Fifty foot deep piers are filled with concrete and a matrix of rebar to anchor the structure. The Pedestrian Bridge was designed by SWA Group and RDP Engineers.
A grid of rebar reinforces the Pier Cap.
Concrete was poured into the pier cap.
The 40’ tall columns are lowered into a bath of molten zinc until it reaches bath temperature of 840 degrees Fahrenheit, at which time the zinc reacts with steel to form zinc/iron intermetalic layers on all surfaces.
Workers guide the column out of the largest dipping tank in North America (approximately 60’ long and 8’ wide).
Each bridge column was placed on a flat bed truck and shipped to the site for installation.
The column is lifted by a crane and slipped onto the awaiting pier cap (General Contractors: Millis Development, Inc.).
Final adjustments are made and the column is bolted into place.
The bridge is built offsite in a warehouse and delivered to the site in six sections. The clear span across the bayou from column to column stretches 150’.
Two sections of the bridge are bolted together and lifted into place.
The final stretch of the weathering steel truss bridge is lowered into place.
Galvanized guardrails are being fabricated which will extrude an additional 15’ above the bridge deck at each column and will be internally illuminated. The lighting will shine through a pattern that will be cut into the steel pylon surfaces. The pattern represents the changing appearance of the moon during the lunar cycle.
Bridge decking material is pressure treated southern yellow pine fastened to the steel truss bridge with corrosion resistant bolts.
Phase 2 work includes reforestation of the areas where vegetation was cleared to make room for the bridge construction. Abutments and columns are currently under construction at the Police Memorial where an additional pedestrian bridge to span Buffalo Bayou is under fabrication and schedule to arrive later this summer.
Eager Houstonians look on as the Jackson Hill Bridge comes one step closer to completion.
What’s next?
Abutments and columns are currently under construction at the Police Memorial where an additional pedestrian bridge to span Buffalo Bayou is under fabrication and schedule to arrive later this summer.
Client: Buffalo Bayou Partnership
Designers: SWA Group
Structural Engineer: RDP Engineers
General Contractor: Millis Development, Inc.
Bridge Fabricator: Excel Bridge
One Response to “Behind the Scenes: Designing Jackson Hill Bridge, The Next Pedestrian Bridge for Buffalo Bayou in Houston”
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Posted by Sarah Peck
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Beijing Finance Street, a project with the landscape as a central spine in an 18-block real-estate and mixed-use development. Photography by Tom Fox. What is the future of the corporate campus? As designers work with the next generation of real estate leaders, I had a chance to write about the changes happening in the… Read more »
Beijing Finance Street, a project with the landscape as a central spine in an 18-block real-estate and mixed-use development. Photography by Tom Fox.
What is the future of the corporate campus? As designers work with the next generation of real estate leaders, I had a chance to write about the changes happening in the design world and what “Corporate Campus 3.0″ will look like. The following is an excerpt from The LEADER, Corporate Real Estate & Workplace (May/June 2013).
Cultural Urbanism and Landscape Urbanism: Corporate Campus 3.0
As populations have begun a trend toward ‘re-urbanization,’ companies are faced with creating workplaces that centralize their business while also giving employees the sustainable, community-driven environment they desire. There is no greater place to see this creative tension than in the hotbed of the technology industry — Silicon Valley.
Demographic and sociological changes are transforming how a campus “works” for companies attracting mobile, educated, talented employees. These knowledge workers seek out the best fit for their career, of course, but they are also highly motivated by sociological and lifestyle aspirations. That means companies find they can no longer just ‘build it, and they will come,’ but are creating workplaces that are often a key reason an employee chooses the company, and more importantly, stays.
Cultural urbanism and landscape urbanism, two design trends that have been taking on a strong influence in real estate development, are springing up in Silicon Valley and San Francisco and resonating in places from Beijing to Salt Lake City. What do these guideposts offer facility designers worldwide?
Beijing Finance Street, Photography by Tom Fox.
In Northern California, workplace design is creating spaces that take into account the cultural and physical surroundings that make the area unique and attractive in the first place. This ‘cultural urbanism’ borrows from a place’s context so that facilities enhance the work experience as well as contribute to the communities in which they are built. In purely urban environments like San Francisco, companies such as Twitter, Salesforce and others are adopting spaces that reflect the urban vibe and excitement of living and working in one of the world’s greatest cities.
It’s a slightly different story in Silicon Valley, whose origins were orchards and farms before technology took root. The context and attractions of this suburban environment derive more from the landscapes and outdoors — and also bring the outdoors in. ‘Landscape urbanism’ suggests that facility designers approach a campus here even more through the lens of the land and natural systems and literally build upon those cues. But even Silicon Valley is becoming more urban as densities increase along highway and rail corridors.
According to a report published by the Silicon Valley Community Foundation in 2012, 30 percent of the total population of Silicon Valley is 25-44 years old. While this is essentially average for American cities, it’s unusual for this once-suburban locale whose very name — Silicon Valley — eludes having a main city or “address.” Every day, masses of young professionals commute from surrounding areas. They want to work in the technology industry, but also want aspects of an urban lifestyle with the convenience of the city.
In all these situations, corporate real estate directors and developers are changing the standards of the corporate campus — urban and suburban alike — from one dictated by the car and an interior-focused workplace, to one of landscape-driven, culturally-resonant urban design. These workplaces incorporate a sensibility of their individual settings, while maximizing the opportunities of sustainable design, ample public space and local infrastructure.
The question, then, is how do developers and designers create places that promote cultural identity and foster more frequent and higher-quality social interaction, both within the workplace to foster ideas and creativity, and within the community to enhance responsible corporate citizenship?
This was part of the ASLA Northern California Chapter Lecture Series this Spring 2013 (May 21, 2013). Read the full article on The LEADER, May/June 2013, here.
Rene Bihan is the Managing Principal of SWA Group’s San Francisco Office and the lead writer for “Landscape Is The Answer,“ a blog series here on IDEAS focused on understanding landscape (and design’s) role in creating better urban, social, and environmental places.
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Designing in the public interest is often challenging–and controversial. How do you know when to do public interest work and when pro-bono efforts are going towards greater good? In our office with the recent launch of our pro-bono Social Impact Design Initiative and partnership with the 1% Program at Public Architecture, we continue to learn from our work… Read more »
Designing in the public interest is often challenging–and controversial. How do you know when to do public interest work and when pro-bono efforts are going towards greater good? In our office with the recent launch of our pro-bono Social Impact Design Initiative and partnership with the 1% Program at Public Architecture, we continue to learn from our work locally.
Chris Hardy, a designer with our San Francisco office, gave a lecture at ASLA’s Northern California Chapter this Spring to talk about the benefits and challenges of pro-bono work. In the lecture, he mentions six ways that pro-bono work makes us better designers:
- New and otherwise unavailable projects help us broaden our experience and train young and intermediate designers in on-the-ground project work;
- Each project makes us better designers, particularly (and often) locally;
- Younger staff can take ownership over the process in ways that might not be available yet in big office-wide projects within the firm and demonstrate leadership and project management skills;
- The project is often an opportunity for mentorship and learning between staff and new contacts within the field;
- Strategic volunteering–when a project is pro-bono at first but beneficial to the firm in the long-term–can bring projects that are otherwise unavailable to the firm. For example, when a community has a need for an amenity that’s very strong, but there’s no visioning documents or initial support, a landscape architect can assist with the visual and preliminary documents needed to get a project up and running to later phases;
- Inter-office collaboration: with quick charrettes and idea brainstorming, you can meet people within the office and collaborate on a quick project with a tight timeframe and generate new ideas quickly.
Additionally, Chris noted that pro-bono and local projects are “often small enough to get your hands dirty” and they are also discrete–in that you can finish them–so that designers can participate in local design-build projects they can point to fairly quickly. These projects, in turn, serve as a model to help us do more work in the field in the future and act as a catalyst for creating a new market or niche area of expertise within your firm.
As he concludes in his lecture, “pro-bono work is often the beginning of a longer process, and we can learn a lot while doing it and capitalize on our experiences to share and grow.”
“As long as we’re passionate, that’s all that matters.”
Chris Hardy is a designer with SWA’s San Francisco office; he holds an MLA from Cornell University and a B.S. In Conservation Biology from Duke University. He is part of the Social Impact Design Initiative at SWA and spearheads projects focused on ecological design and collaborative community infrastructure.
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Posted by Sarah Peck
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Long after the media stops talking about the damage done from hurricanes like Sandy, Ike, and Katrina, in each of our communities, we are left with the task of rebuilding our coastlines and cities to be more resilient to the wipe outs that take years to recover from. Today, after eight years, have we forgotten… Read more »
Long after the media stops talking about the damage done from hurricanes like Sandy, Ike, and Katrina, in each of our communities, we are left with the task of rebuilding our coastlines and cities to be more resilient to the wipe outs that take years to recover from. Today, after eight years, have we forgotten about Katrina? What do we need to take the long view on coastal resilience?
In a feature-length interview with Jared Green on ASLA’s The DIRT Blog, CEO Kevin Shanley speaks about the future of our coasts and the need for long-term resilience strategies. The news media isn’t a good place to host conversations about our coasts, because the long-term planning and strategies needed for resilience require dedication over decades, not a sensational headline.
“The challenge after Sandy is to ask ourselves what’s the next thing that’s going to distract everybody? In 2001, Houston was hit not with a hurricane but with a really amazing tropical storm called Allison. It dumped thirty inches of rain in twenty-four hours. It flooded seventy-five thousand homes and ninety five thousand cars. It was an amazing flood. It actually tracked all the way up to Canada. Post-Allison, many good things started to happen and a number actually did happen. There were bigger policy changes and changes that many of us were working on, but then in September 2001, guess what happened? The national attention, the local attention, everybody’s attention totally changed and a lot of policy-changing momentum was lost.”
“The lesson we need to learn is quite important: we forget really quickly. Katrina happened, now eight years ago. Some structural changes were made to the levee system, but all of the really great plans to re-build New Orleans as a more sustainable community, a better community, a more integrated community came to nothing. In Houston in 2008, Hurricane Ike was a near miss.”
What can we do to improve our cities and our coasts? How can we become more resilient? And are soft infrastructure approaches the best strategy — or are they also problematic?
Check out the entire interview on The Dirt.
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Posted by Sarah Peck
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