(c) to traffic on a road other than a motorway information of a directional nature of the description specified in or under a diagram in Part III of Schedule 1 shall be of the size, colour and type shown in the diagram relating to that information;
(e) to traffic on a motorway information of a directional or other nature specified in or under a diagram in Part V of Schedule 1 shall be of the size, colour and type shown in the diagram relating to that information.
9A.—(1) Subject to the provisions of these Regulations, a traffic sign for conveying to vehicular traffic on roads the requirement specified in paragraph (2) or (3) shall be of the size, colour and type shown in diagram 610.
(2) Except as provided in paragraph (3) the requirement conveyed by the sign shown in diagram 610 shall be that vehicular traffic passing the sign must keep to the left of the sign where the arrow is pointed downwards to the left, or to the right of the sign where the arrow is pointed downwards to the right.
(3) On an occasion when a vehicle is being used for fire brigade, ambulance or police purposes and the observance of the requirement specified in paragraph (2) would be likely to hinder the use of that vehicle for the purpose for which it is being used on that occasion then instead of that requirement, the requirement conveyed by the traffic sign in question shall be that the vehicle shall not proceed beyond that sign in such a manner or at such a time—
(i) as is likely to cause danger to the driver of any other vehicle proceeding on or from another road or on or from another part of the same road, or
(ii) as is likely to cause danger to non-vehicular traffic proceeding on or from another road or on or from another part of the same road.