Delhi Rd has some narrow sections of single lane road, but is mostly downhill so move the pace along here! It is advisable towards the big descent near the end to block the traffic behind so no-one tries to pass on the S bends down the hill. At the bottom turn into the park. Now it's a nice gentle climb out of the park, then use the bike path to go under Lane Cove Rd and out onto the (shared) footpath on the other side, then into Fontenoy Rd. On the way back to Macquarie Uni there is some traffic in Talavera and Herring Rds so be careful but assert your rights. Pass thorugh the Uni climbing out the Culloden Rd exit and onto Waterloo rd, then left into Vimiera and back to the start.