Italian designers Francesco Colarossi, Luisa Saracino and Giovanna Saracino created a Solar Wind bridge
project for a Solar Park Works – a competition in Italy. The aim of the
competition was to get designers to imagine new ways to reuse an
elevated highway between Bagnera and Scilla in Italy, incorporating new
energy efficient solutions. The designers won second place for this
project.
The proposed design has 26 wind turbines incorporated in structure of
the bridge. They are integrated into the spaces between the bridge’s
pillars. The traditional asphalt would be replaced with 20 km (12.4
miles) of solar roadways, consisting of a dense grid of solar cells
embedded in the road surface, providing 11.2 million kWh per year. The
designers claim this system, combined with the 26 wind turbines
underneath the road would provide enough electricity to power
approximately 15,000 homes.
In addition to the "solar roadways,” the top surface of the bridge
would also include a "green promenade” along its length comprising solar
greenhouses for growing local produce. Drivers would be able to stop
along the bridge to buy some fresh fruit and vegetables while enjoying
panoramic bridge views.
The position of the bridge, as it is elevated above a gorge, is
optimal for using wind as an energy source. The same goes for solar
power. There might be some concerns about the turbine vibration effects,
danger to the local bird population and the general maintenance issues.
However, this seems to be an interesting approach to multiple use of
highways and it’s well worth dwelling upon.
Источник: http://www.evolo.us/architecture/solar-wind-bridge-efficient-reuse-of-highways/ | 
