Rule 409

Signal aspect: Clear to Slow

Indication: Proceed, approaching next signal at SLOW speed.

1. A high mast, staggered, double aspect signal displaying yellow on the top, flashing yellow on the bottom.A high mast, staggered, double aspect signal displaying yellow on the top, yellow on the bottom.
2. A high mast, inline, double aspect signal displaying yellow on the top, yellow on the bottom.
3. A high mast, inline, triple aspect signal displaying yellow on the top, yellow in the middle, red on the bottom.
4. A high mast, inline, triple aspect signal displaying green on the top, red in the middle, flashing yellow on the bottom.
5. A double aspect, dwarf signal, displaying yellow on the top, yellow on the bottom.