27.—(1) In this regulation and regulation 28—
“controlled area” means a length of carriageway—
which is adjacent to a signal-controlled crossing facility and has a zig-zag line marked along each of its edges (with or without zig-zag lines also marked down its centre); and
in or near which no other signs or markings have been placed except ones comprised in the combination of signs and markings indicating the presence of the facility or shown in diagram 610, 611, 612, 613, 616, 810, 1029 or 1062;
“local service” does not include an excursion or tour as defined by section 137(1) of the Transport Act 1985; and
“vehicle” does not include a pedal bicycle not having a sidecar attached to it, whether or not additional means of propulsion by mechanical power are attached to the bicycle.
(2) Subject to paragraphs (3) and (4) and without prejudice to regulation 28, a zig-zag line shall convey the requirement that the driver of a vehicle shall not cause any part of it to stop in the controlled area in which it is marked.
(3) Paragraph (2) does not prohibit the driver of a vehicle from stopping it in a controlled area—
(a)if the driver has stopped it for the purpose of complying with an indication given by a light signal for the control of vehicular traffic or the direction of a constable in uniform or a traffic warden;
(b)if the driver is prevented from proceeding by circumstances beyond his control or it is necessary for him to stop to avoid injury or damage to persons or property; or
(c)when the vehicle is being used for police, fire brigade or ambulance purposes.
(4) Paragraph (2) 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 operation involving building, 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 controlled area 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;
(b)in the provision of a local service, and the vehicle, having proceeded past the light signals 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.