(2) The significance of the light signals prescribed by Regulation 27 of these Regulations, as varied in accordance with the provisions of Regulation 28 of these Regulations, shall be as follows:—
(a) subject as provided in sub-paragraph (d) of this paragraph, the red signal shall convey the prohibition that vehicular traffic shall not proceed beyond the stop line on the carriageway provided in conjunction with the signals;
(b) subject as provided in sub -paragraph (d ) of this paragraph, the amber with-red signal shall denote an impending change in the indication given by the signals from red to green (where a green signal is provided) or from red to green arrow or arrows but shall not alter the prohibition conveyed by the red signal;
(c) the green signal (where a green signal is provided ) shall indicate that vehicular traffic may pass the signals and proceed straight on or to the left or to the right;
(d) any green arrow during such time as it is illuminated shall indicate that vehicular traffic may pass the signals and proceed only in the direction indicated by the arrow notwithstanding any other indication given by the signals;
(e) the amber signal shall, when shown alone, convey the prohibition that vehicular traffic shall not proceed beyond the stop line, except in the case of any vehicle which when the signal first appears is so close to the said line that it cannot safely be stopped before passing the line.
(3) Vehicular traffic passing any light signals in accordance with the foregoing provisions of this Regulation shall proceed with due regard to the safety of other users of the road and subject to the direction of any police constable in uniform or other duly authorised person who may be engaged in the regulation of traffic.
(4) For the purposes of this Regulation the expression "stop line" means a traffic sign shown in diagram No. RM1 in the Second Schedule to these Regulations.
31.—(1) Light signals indicating to pedestrians the period during which it is desirable that they should cross the carriageway may be used in conjunction with the light signals prescribed by Regulation 27 or those light signals as varied in accordance with the provisions of Regulation 28 of these Regulations and, if so used , shall consist of:
(a) a lamp facing across the carriageway which , when lit, illuminates the "CROSS" or "CROSS NOW" in white or green letters on words a black ground; or
(b) two lamps arranged vertically with their centres not more than 28 inches apart and facing across the carriageway, the upper lamp of which, when lit, shows a red light or illuminates the word "WAIT" in red letters, and the lower lamp, when lit, illuminates the words "CROSS" or "CROSS NOW" in white or green letters, on a black ground.
In the case of any such signals the provisions of paragraph (f) of Regulation 27 of these Regulations shall apply thereto as they apply in the case of light signals prescribed by that Regulation.
