Solar Bus Shelters Debut

18 August 2009 - 6:00am

San Francisco has begun installing 1,200 new bus shelters that incorporate a solar array on the roof to power an LED display showing bus arrival times.

"Taking its cue from the shape of seismic shock waves, the canopy is made of recycled, 40 percent post-industrial polycarbonate, with a ribbon of solar cells running down its center. The photovoltaic (PV) material supplies power to a LED arrival-time display and to a push-button loudspeaker for visually impaired riders, with extra power being fed back into the grid."

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Source: The Architect's Newspaper, August 14, 2009
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There is lots of theory, and lots of wonderful mathematics, and even lots of dealmaking. But the financial engineers are not real engineers who take responsibility for the bridges that fall down. They have no notion of a safety factor.