
Supplementary
Advanced
Shows specific times a linked restriction is active.
In Ireland, the Periods of Operation sign indicates: Shows specific times a linked restriction is active. Understanding this is crucial for safe driving and passing your DTT.
The "Periods of Operation" is officially classified as part of the SUPPLEMENTARY group in Ireland. Like other signs of this type, it alerts drivers to specific rules, hazards, or information they must immediately observe.
Yes, you should expect the Periods of Operation sign to appear on your Irish Driving Theory Test (DTT). You must be able to identify it as a SUPPLEMENTARY and know what it requires from you as a driver.
Get instant access to 400+ signs, interactive quizzes, and progress tracking. Download the free app today!