The WHEN FLASHING (W16-13P) supplemental plaque is designed to be used with warning signs when supplemented by a Warning Beacon to indicate specific periods when the condition or activity is present or likely to be present. 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