If the condition indicated by a warning sign is located on an intersecting road and the distance between the intersection and condition is not sufficient to provide adequate advance placement of the warning sign, a Supplemental Arrow (W16-5P) plaque should be used below the warning sign. A supplemental warning plaque should not be mounted or displayed alone, but installed on the same post and below the warning sign that it supplements. This sign is a horizontal rectangle with a black legend and border on a yellow background.
- Retroreflective sign is visible day and night
- Durable, weather-resistant traffic grade aluminum
- Pre-punched with radiused corners and 3/8" mounting holes