Ottawa By-law 2017-301, s. 45(1) — Traffic and Parking By-law

No Person shall drive any animal or vehicle otherwise than counter-clockwise direction in any roundabout:

• (a) While approaching a roundabout, a driver shall obey any authorized signs, to guide their desired entrance and exit;
• (b) While approaching a roundabout, a driver shall stop for any pedestrians approaching or crossing at the crossover;
• (c) A driver shall enter the roundabout only once there is an acceptable gap in traffic and it is safe to do so;
• (d) Upon exiting the roundabout, a driver shall stop for any pedestrians approaching or crossing at the crossover;
• (e) A driver shall proceed to the edge of the circulatory roadway and yield to vehicles in all lanes approaching from their immediate left before entering the roundabout;
• (f) unless signs or road markings indicate otherwise, a driver shall enter in the lane appropriate for the desired exit and follow the lane around the roundabout in order to depart the roundabout at that exit.