Trolleybuses are electric vehicles which makes them more environmentally friendly than fossil fuel or hydrocarbon-based vehicles when implemented in the city. A trolleybus draws power from overhead wires using spring-loaded trolley poles made from wood and metal, which complete the electrical circuit by transferring electricity from a "live" overhead wire to the control and the electric traction motors of the trolley bus, it is a type of current collector. The city of Belgrade uses trolleybuses as one of it's major modes of public transport with an extensive route stretching across the city and the suburbs.
Printed piezoelectric cells are embedded into the main body of the helix structure and the suspended cluster of conducting wires connecting the building to Belgrade's trolleybus infrastructure of overhead power lines. Piezoelectric materials generate electrical energy when subjected to mechanical strain, vibrational-energy harvesting is used in this design, generated by trolleybus pulses as they pass through the station and rain falling onto the cluster of suspended cables.
The piezocells are stacked within the folded cross section which further increases the vibration within the structure from the trolley-poles, the kinetic displacement deforms the semi-conductor cells, in turn amplifying the output; wind and rain also vibrate the cluster of steel wires which connect the project to existing overhead wires, the design acts as an electrical amplifier, providing street lighting, Internet WiFi access for immediate neighborhoods as well as offering an adaptive power port, commuters will be able to charge mobiles and smart cars at these trolleybus station gardens.
The trolleybus garden acts as a capacitor and transistor to step up the harnessed electrical energy, transforming AC current from the piezoelectric cells to DC current before it can be cached in the capacitor ready for distribution.