Regulation 10

if the driver has stopped for the purpose of complying with rule 6 or 11(1)(b);

if the driver is prevented from proceeding by circumstances beyond his control or it is necessary for him to stop in order to avoid an accident; or

for so long as may be necessary to enable the vehicle, if it cannot be used for such purpose without stopping along any part of a road, to be used —

for fire service or police purposes;

in connection with any building operation, demolition or excavation;

for the removal of any obstruction to traffic;

for the maintenance, improvement or reconstruction of that part of the road; or

for the laying, erection, alteration, repair or cleaning in or near that part of the road of any traffic sign or sewer or of any main, pipe or apparatus for the supply of gas, water or electricity, or of any telegraph or telephone wire, cable, post or support.