How soon must an unacceptable temporary traffic control device be replaced upon discovery?

The correct timeframe for replacing an unacceptable temporary traffic control device is 12 hours upon discovery. This standard reflects the emphasis on maintaining safe and effective traffic conditions. When a temporary device is deemed unacceptable—whether due to visibility issues, damage, or improper placement—prompt action is necessary to prevent confusion among drivers and ensure their safety.

The 12-hour guideline strikes a balance between the urgency of the situation and the logistical challenges that may arise in quickly replacing devices in the field. It allows enough time for the necessary personnel to assess the situation and implement corrective measures while minimizing the risk of accidents or traffic disruptions due to inadequate signage or control measures.

In practice, organizations involved in traffic management must be vigilant in monitoring the condition of these devices. The emphasis on replacing them within this specific timeframe highlights the role of temporary traffic control devices in guiding safe and efficient transportation through work zones or other areas where conditions might change rapidly.