What should you do?
Use it to check you are on the right route and plan your exit.
How to recognise it
A blue rectangle with Áth Cliath / DUBLIN 46 km and An Nás / NAAS 17 km, below an M7 route number.
Common confusion
The numbers are distances in kilometres, not speed limits.
Explanation written by the My Driving Test editorial team using the Department of Transport Traffic Signs Manual conventions and the RSA Rules of the Road.
