Buses, microbuses, trolleybuses belong to category M2 and M3 vehicles depending on their weight, w'ith those heavier than 5 tonnes belonging to the latter category. Both M2 and M3 classes must have more than eight seats, excluding the driver’s seat (see Table 4.1). The successful tenderer is selected based on a point system comprising the bid price and maintenance of service quality and passenger safety. The final score also depends on the age of the buses and microbuses provided.