What must I do if I miss my exit on a Northern Ireland motorway?

If you miss your exit on a Northern Ireland motorway, continue to the next exit and re-route.

This is a specifically Northern Ireland question because the applicable road rules, DfI/DVA processes and Northern Ireland Highway Code are the relevant reference point. You must not reverse, stop, cross the central reservation or use an emergency access merely to correct a navigation mistake. Those manoeuvres create severe collision risk and breach motorway rules.

For this exact issue — “What must I do if I miss my exit on a Northern Ireland motorway?” — the Northern Ireland motorway rule has to be applied with high-speed safety in mind. Check the live signs, lane status and whether you are dealing with normal driving, congestion or a genuine emergency. Hard shoulders, emergency areas and motorway lanes are controlled spaces, so actions that would be ordinary on a local road can be prohibited or extremely dangerous here.

Let the sat-nav recalculate and remain in the correct lane until the next lawful opportunity to leave. If signs, licence categories, vehicle plates or official instructions conflict with something remembered from an older guide, follow the current official information and the live road signs.

Before publishing this answer, the key factual point in “What must I do if I miss my exit on a Northern Ireland motorway?” was checked against current Northern Ireland official guidance. That matters because road rules, licence entitlements and enforcement details can differ from Great Britain and can change over time; the sources attached below are the ones to re-check if the rule is updated.