22.—(1) Regulation 20 does not prohibit the driver of a vehicle from stopping it in a controlled area—
(a)for so long as may be necessary to enable the vehicle to be used for the purposes of—
(i)any building operation, demolition or excavation;
(ii)the removal of any obstruction to traffic;
(iii)the maintenance, improvement or reconstruction of a road; or
(iv)the laying, erection, alteration, repair or cleaning in or near the crossing of any sewer or of any main, pipe or apparatus for the supply of gas, water or electricity, or of any telecommunications apparatus kept installed for the purposes of a telecommunications code system or of any other telecommunications apparatus lawfully kept installed in any position,
but only if the vehicle cannot be used for one of those purposes without stopping in the controlled area; or
(b)if the vehicle is a public service vehicle being used—
(i)in the provision of a local service; or
(ii)to carry passengers for hire or reward at separate fares,
and the vehicle, having proceeded past the crossing to which the controlled area relates, is waiting in that area in order to take up or set down passengers; or
(c)if he stops the vehicle for the purpose of making a left or right turn.
(2) In paragraph (1) “local service” has the meaning given in section 2 of the Transport Act 1985(1) but does not include an excursion or tour as defined by section 137(1) of that Act.