Hi, the 766 runs from Box Hill to Burwood along Whitehorse Road, Elgar Road, Mont Albert Road, Union Road, Riversdale Road, Through Road, Thomas Street, and Warrigal Road. I have followed the OSM Wiki, which says to separate the route into the two directions.
See
https://wiki.openstreetmap.org/wiki/Buses
https://www.ptv.vic.gov.au/route/15800/766-box-hill-station-burwood-via-surrey-hills/