Parking Lots as Solar Farms

There are ways to transform surface parking lots, which are altogether too numerous in Los Angeles, from an eyesore into a resource. Surface parking lots can be planted with "solar groves" - rows of solar panels - that generate electricity for immediate use (electric charging stations) or provide renewable energy for the grid. 

Retrofitting existing parking lots is not terribly difficult and parking capacity is unaffected. In fact, providing electric vehicle owners with a simple and affordable way to recharge their cars while in the office or while out running errands will reduce "range anxiety" and provide the infrastructure needed to make electric vehicles a viable alternative to gas cars. You can read more about "solar groves" here.

Integrating Sustainability into Bus Shelter Design

Bus stations provide an open platform for layering multiple sustainable technologies in a single location. Installing photovoltaic panels on top of bus shelter canopies is one of the most common practices of sustainable bus shelter design. Some cities are also beginning to explore the possibility of using bus shelters to capture and manage storm water.

Solar-powered bus shelter in San Francisco

San Francisco is in the process of rolling out 1,100 new bus shelters that use roof top solar panels to run lights and power an on-site wifi network, which has the potential to provide significant coverage when expanded citywide. The creative repurposing of bus shelters as a platform for advancing environmental and social sustainability goals holds tremendous promise and is an area that is likely to see further innovation, particularly as bus rapid transit lines like the Orange Line (and future Wilshire Line) continue to attract riders.

Solar panels on bus shelter canopy in San Francisco

To understand the potential for leveraging bus shelters as a way to advance sustainability in Los Angeles, consider that Metro operates 15,967 bus stops throughout its service area. If the transit authority built bus shelters similar to those being used in Corona, which use roof top solar panels to feed 1,748 kilowatt-hours of electricity per year into the grid, it could generate roughly 27,910,316 kWh per year of energy. That's enough energy to power approximately 4,560 homes.

15,967 bus stops x 1,748kWh/bus stop = 27,910,316 kWh
27,910,316 kWh/6,120 kWh per LADWP res. customer = 4,560 households

With nearly sixteen-thousand bus stops in the Metro system, there's a tremendous opportunity to use these sites for producing renewable energy, showcasing local artists and providing other socially valuable services like wifi or way-finding information. Given DWP's target for renewable energy production (35% by 2030), the demand for renewable energy in Los Angeles is high and as local capacity for renewable energy production increases, there is less need for running expensive high powered transmission lines through sensitive environmental habitat.

Clearly Los Angeles could be doing more to deploy its own contextually sensitive design for sustainable bus shelters and leverage such a program to advance additional co-benefits for the region: "green" its transportation system, decrease carbon dioxide emissions, reduce storm water runoff, create jobs for the manufacturing and installation of new sustainable bus shelters, expand free wifi coverage, showcase local arts and culture, and enhance the dissemination of important public information.

Sources:

- Renewable Energy World, "City of Corona Turns Bus Shelter into Mini Power Plant"

- Los Angeles County Metropolitan Transportation Authority (Metro)

- LADWP Green Power Annual Report 2009

Solar Freeways

A Swedish architect, Mans Tham, proposes covering the nearly 500 miles of freeway in LA County with solar panels. Tham's "Solar Serpents in Paradise" leverage the enormity and urban geography of freeways to produce something positive: locally produced renewable energy that can be fed easily into the existing grid, thereby reducing the need for environmentally destructive solar farms in the desert.

Just covering the 10 freeway from downtown to Santa Monica would produce enough electricity to power all the households in Venice. There is also the potential to provide electric charging stations under freeway over passes and to use the carbon dioxide rich air from the freeway to grow algae on underutilized shoulder space.

Regardless of what one may think of freeways, they are likely to remain part of the built environment for many years to come. But simply denigrating freeways as hulking concrete structures that divide communities and degrade local air quality ignores their potential for becoming part of the sustainability solution. Taking sunken infrastructure investments and repurposing them to serve current needs saves time, money, land and is probably the most effective way for existing urban areas like Los Angeles to transition into a more sustainable future.