It eventually expanded to have branches in Christchurch and Queenstown and for a period operated a fleet of coaches based in Auckland.

In early February 2014, Go Bus Transport agreed to purchase the urban, school, charter and special needs operations of Invercargill Passenger Transport, gaining around 200+ buses and depots in Christchurch, Queenstown, Dunedin, Invercargill and Gore.

It reverted to Citibus in 2005, but the Newton's brand for tour and charter coaches remained in use by Invercargill Passenger Transport.

[1] The new owners elected to retain the 'Citibus' naming, branding the Dunedin operation Passenger Transport Citibus,[5] but decided to sell the Connexions business.

Passenger Transport was the major operator of Ministry of Education school bus services in the Queenstown Lakes area for some years.