Vauxhall Cross is a key public transport interchange between rail, underground and bus services. Situated on the southern boundary of the Mayor of London's congestion charging zone, the significance of its location is expressed in the design of the bus station canopy. The broad sweep of the undulating ribbon canopy provides shelter from the rain over the circulation areas, and localised protection from the wind at seating and information points. The open form offers free and secure movement through permeability and visibility. The Controller's office is strategically located beneath the cantilevering arms of the canopy to provide views down the bus station spine, and towards the entrance to the railway and underground stations. The simple repeating form allows the prefabrication and reduced on-site construction necessary to minimise disruption to the continuous operation of bus services. Materials are selected for their robustness and ease of maintenance. A significant proportion of the electricity demand of the interchange is provided by a 200m2 array of photovoltaic cells on the cantilevered arms of the canopy. The installation is funded by a grant from the Government's major Photovoltaic Demonstration Programme. It is the first application of high efficiency hybrid crystalline and thin film photovoltaic technology outside of Japan. The canopy is a landmark and an urban sculpture. By night it becomes an animated floodlit beacon. It is a place of function designed as an object of attraction and a symbol of urban regeneration.