Beovoz was the suburban/commuter railway network that provided mass-transit services in the city, similar to Paris's RER and Toronto's GO Transit. The main usage of system was to connect the suburbs with the city centre. Beovoz was operated by Serbian Railways. However, this system was abolished back in 2013, mostly due to introduction of more efficient BG Voz. Belgrade is one of the last big European capitals and cities with over a million people to have no metro or subway or other rapid transit system, though Belgrade Metro is in its planning stages.