[2] In November 1970, Barnes Coaches was purchased with routes 54 Chatswood station to Macquarie University, 124 Chatswood to Lindfield, 221 Lindfield to Bradfield Park and 224 Tambourine Bay to Wynyard via Northwood.
[3][4] In July 1973, route 89 Epping to Ryde was purchased from Eastwood Bus Company.
In May 1977, a new depot was opened in Macquarie Park to replace the Carlingford and Turramurra facilities.
[5] Routes 54, 124 and 221 were also transferred here from Lane Cove allowing the Blaxlands Corner depot to close.
[8][9][10] In December 1988, routes 564 and 565 were sold to East Lindfield - Killara Bus Service with six buses and the remainder of the routes sold to Hornsby Bus Group in January 1989 with 21 buses and four coaches.