When should traffic control devices be removed after sunset?

The correct answer is that traffic control devices should be removed before sunset. This ensures that drivers can clearly see and understand the devices while there is still adequate daylight. Proper timing for the removal of traffic control devices is crucial for maintaining roadway safety and effective communication with drivers.

Removing them too late, such as immediately after sunset or within a specific timeframe like 15 minutes or half an hour, could create confusion or a hazardous situation for nighttime drivers who may not be able to see the devices clearly. By removing devices before sunset, authorities minimize the risk of accidents and ensure that vehicle operators are navigating under safe conditions.