
Supplementary
Advanced
States longitudinal extent of a zone.
In Ireland, the Length sign indicates: States longitudinal extent of a zone. Understanding this is crucial for safe driving and passing your DTT.
The "Length" 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 Length 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!