Newton's Coachways was a charter coach, sightseeing and school bus company and was formed from an earlier business Marshall Motors in 1962 which was bought by Stewart Newton and Norma Newton ("née" Marshall) from Norma's uncle. In 1991 Newton's took over the Dunedin area services and fleet of the New Zealand Railways Road Services, then known as "Cityline" and re-branded it "Newton's City Line". Newton's was taken over by Citibus in 1993, and the combined firm traded for many years as "Citibus-Newton Ltd" or "CNL". It reverted to "Citibus" in 2005, but the Newton's brand for tour and charter coaches remained in use by Invercargill Passenger Transport.