 The new Transport Minister, Martin Pakula, said that another major problem still affecting trams was "canyoning", in which trams regularly drop out of remote communication with a central server because of tall city buildings.One source close to the Myki project said the government had considered installing remote devices on tall CBD buildings to improve communications with all devices in the city centre.After the initial launch, tickets could only be purchased online, or from six regional cities where Myki was already in use, further limiting the number of travellers able to use the system.