REDUCE SPEED NOW' Warning Sign - Post Mount Diagram 511 R2/RA2This red sign reading "REDUCE SPEED NOW" is commonly seen accompanying other warning signs where speed needs to be reduced or is a critical factor. This is often at junctions where two roads cross, such as those outlined in diagrams 504. 1, 505. 1, 506. 1, 507. 1, and 510. There are many other signs that this REDUCE SPEED NOW sign can be used with, for a definitive list please see chapter 4 of Traffic signs manual. A link to this can be found on our