The SHOULDER WORK (W21-5) sign should be used to warn of maintenance, reconstruction, or utility operations on the highway shoulder where the roadway is unobstructed. This sign is a diamond shape with a black legend and border on an orange background.
- Retroreflective sign is visible day and night
- Durable, weather-resistant traffic grade aluminum
- Pre-punched with radiused corners and 3/8" mounting holes