Υλικό για μεταφόρτωση σε μορφή SHP για χρήση με GIS και KML για χρήση με Google Earth When the bus system of Thessaloniki was first established in 1957 all lines were numbered from the eastern to the western routes starting with 1. This applied to all routes from 1 to 29. However, after 1979 the rest of the lines were numbered based on the date of their creation.