What condition is an Arrow Board considered if all lamps are working?

An Arrow Board is considered "Acceptable" when all lamps are functioning properly. This indicates that the device is effectively communicating its intended message to road users, which is crucial for safety in temporary traffic control situations. When each lamp is operational, the board can accurately depict directional or other necessary signals, ensuring that drivers receive clear guidance.

In the context of the overall maintenance of traffic practices, having all lamps working is indicative of proper equipment function. This not only supports compliance with safety regulations but also enhances the efficiency of traffic control in work zones. Consequently, an Arrow Board in this condition demonstrates reliability and serves its purpose effectively, reflecting an ideal operational status for traffic control devices.