. "One of their main advantages is that they reduce the number of drivers needed to run a service for a specific number of people - i.e. it is usually much more cost-efficient to run a bi-articulated bus with one driver, than, for example, to run two smaller non-articulated buses providing the same total number of seats. Disadvantages include some difficulties in traffic, the need to have bus stops catering to the extended length, and the fact that two buses with the same capacity can be used more flexibly, such as having one bus arrive every five minutes, instead of one of the larger articulated buses every ten minutes (as an example providing the same service capacity, but different frequencies)."@en . . . . . . . "One of their main advantages is that they reduce the number of drivers needed to run a service for a specific number of people - i.e. it is usually much more cost-efficient to run a bi-articulated bus with one driver, than, for example, to run two smaller non-articulated buses providing the same total number of seats."@en . . "Bi-articulated bus"@en . .