Double-decker buses: London has them, Hong Kong has them and next month Melbourne will get them too.

Or rather, it will get one double-decker bus initially, operating in tandem with the new Regional Rail Link, with the prospect of more buses to come in future if there is enough demand.

Carl Thomas of Volgren in the double-decker bus. Credit:Penny Stephens

Public Transport Victoria is considering using the high-capacity bus to shuttle passengers between brand new railway stations at Wyndham Vale and Tarneit, which will open on June 21, and stations on the Werribee line.

It will be operated by CDC Victoria, which has routes in Melbourne's west, Geelong and Ballarat, which will all be served by the new Regional Rail Link. It also operates out of an Oakleigh depot in Melbourne's east.