Route M52 operates limited stops between Parramatta and City Circular Quay via Rydalmere, Top Ryde, Drummoyne and Rozelle. It began operation on 8 August 2010.
Route M52 served as a replacement for Route L20, which operated a similar route between July 200 and August 2010. In 2004, the Unsworth report identified the corridor was key high frequency corridor. In the 2013 “Sydney’s Bus Future” report, the M61 was designated as a rapid route, with priority to be given in terms of bus priority infrastructure and timetable upgrades.
Outside of the Metrobus operating hours, services are available on the all stops overnight Route 520. Originally the M52 operated along George Street in the CBD. Due to CSELR construction, from October 2015 it instead operated along Elizabeth Street.
The M52 runs every 5 minutes during peak periods, 10 minutes during off-peak weekday periods, and 15 minutes on weekends. It operates between 6am and 8pm daily. It is operated by a mix of 12.5m and articulated “bendy” buses from Ryde depot.
Transport NSW Blog 