Restriction on stopping
6.—(1)  Subject to this rule, no vehicle shall stop or remain at rest on a carriageway.
(2)  Where it is necessary for a vehicle to stop or remain at rest while it is on an expressway —
(a)by reason of a breakdown or mechanical defect or lack of fuel, oil or water required for the vehicle;
(b)by reason of any illness, accident or emergency;
(c)to permit any person in or on the vehicle to recover or remove any object which has fallen on the expressway; or
(d)to permit any person in or on the vehicle to give help to any other person in any of the circumstances specified in this paragraph,
the vehicle shall, as soon as is practicable, be driven or moved off the carriageway to the shoulder or verge on the left or near side of the vehicle.
(3)  A vehicle which is at rest on a shoulder or verge in any of the circumstances specified in paragraph (2) —
(a)shall, as far as is reasonably practicable, remain at rest on that shoulder or verge in such a position that no part of it or of any load carried obstructs or is a cause of danger to any other vehicle using the carriageway; and
(b)shall not remain at rest on that shoulder or verge longer than is necessary in those circumstances.
(4)  Nothing in this rule shall preclude a vehicle from stopping or remaining at rest on a carriageway while it is prevented from proceeding along that carriageway by the presence of any other vehicle or any person or object or in accordance with a traffic sign or on the direction of a police officer.