The University was faced with a problem of reduced parking spaces due to ongoing campus redevelopment and wanted to ease daytime car park congestion and ensure that those who needed the spaces most were able to park. The terminals have dual tariffs built in, allowing the University to differentiate prices between members of the public and permit holders. Users can switch between the two tariffs at the push of a button. The University chose the solar powered version for environmental reasons and for ease and flexibility of installation.