Advance Clear to Medium · Rule 413
Indication: Proceed, approaching second signal at MEDIUM speed.
3 mast presentations
High mast signal, double aspect, staggered. top: flashing yellow; bottom: green.
A high mast, staggered, double aspect signal displaying flashing yellow on the top, green on the bottom.
High mast signal, double aspect, inline. top: flashing yellow; bottom: green.
A high mast, inline, double aspect signal displaying flashing yellow on the top, green on the bottom.
High mast signal, triple aspect, inline. top: flashing yellow; middle: green; bottom: red.
A high mast, inline, triple aspect signal displaying flashing yellow on the top, green in the middle, red on the bottom.