Route M40 is a Metrobus route between Bondi Junction and Chatswood via Taylor Square, Sydney CBD and Willougbhy. It commenced operation on 18 July 2010.
The M40 runs every 10 minutes during peak periods, 15 minutes during off-peak weekday periods, and 20 minutes on weekends. It operates between 6am and 8pm daily.
The M40 usually operates using articulated “bendy” buses from North Sydney, Waverley and Willoughby depot. These buses are sometimes substituted by 12.5m buses.