Advance Clear to Stop · Rule 415
Indication: Proceed, prepared to Stop at second signal.
4 mast presentations
High mast signal, single aspect. top: flashing yellow.
A high mast, single aspect signal displaying flashing yellow.
High mast signal, double aspect, staggered. top: flashing yellow; bottom: red.
A high mast, staggered, double aspect signal displaying flashing yellow on the top, red on the bottom.
High mast signal, double aspect, inline. top: flashing yellow; bottom: red.
A high mast, inline, double aspect signal displaying flashing yellow on the top, red on the bottom.
High mast signal, triple aspect, inline. top: flashing yellow; middle: red; bottom: red.
A high mast, inline, triple aspect signal displaying flashing yellow on the top, red in the middle, red on the bottom.