A self-driving bus which not only carries passengers but talks to them could be seen in several major US cities within months.

While the commercial launch of “autonomous cars” is still seen as being several years away, the “Olli” could begin operation on university campuses in Las Vegas and Miami later this year.

It has already been tested in Maryland.

The electrically-powered Olli, which can carry 12 passengers, is likely to enter service initially in closed locations such as on campuses and at airports.