Article 22. Islands on the Carriageway

Without prejudice to the provisions of Article 10 of this Convention, a driver may pass to the left or to the right of islands, posts and other devices set up on the carriageway on which he is travelling, except in the following cases:

(a) Where the side on which the island, post or device shall be passed is indicated by a sign;

(b) Where the island, post or device is on the centre-line of a two-way carriageway; in this case the driver shall keep to the side of the island, post or device corresponding to the direction of traffic.