Another means of public road transport in the city centre is the Cavalier (), an electric shuttle bus vehicle operated by LPP since May 2009. There are three such vehicles in Ljubljana. The ride is free and there are no stations because it can be stopped anywhere. It can carry up to five passengers; most of them are elderly people and tourists. The Cavalier drives in the car-free zone in the Ljubljana downtown. The first line links Čop Street, Wolf Street and the Hribar Embankment, whereas the second links Town Square, Upper Square, and Old Square. There is also a trackless train (tractor with wagons decorated to look like a train) for tourists in Ljubljana, linking Cyril and Methodius Square in the city centre with Ljubljana Castle.