Can you use a crawler lane when driving slowly uphill in Northern Ireland?

Yes. Where provided and signed, a climbing or crawler lane is intended to help slower traffic travel uphill without holding up other vehicles.

Highway Code rule 139 advises slower drivers to use the crawler lane where appropriate and to watch for signs showing that it is ending. It does not replace the speed limit or give other drivers permission to make an unsafe pass. Check mirrors before moving into or out of the lane, indicate where needed and merge without forcing a faster vehicle to brake sharply.