The maximum speed limit on a road outside a built-up area, unless otherwise signed, is generally:
- In the UK, the national speed limit for cars and motorcycles on single carriageway roads outside built-up areas is 60 mph (approximately 96 km/h)
- In Ireland, the default speed limit on many rural local roads outside built-up areas has recently been reduced from 80 km/h to 60 km/h as of February 2025 to improve road safety
- In Queensland, Australia, the default speed limit on roads outside built-up areas is 100 km/h unless otherwise signed, with some higher standard roads allowing up to 110 km/h if indicated by signs
Thus, the exact maximum speed limit depends on the country and specific road classification, but commonly it is around 60 mph (UK) or 60-100 km/h (Ireland and Australia) unless a different speed limit sign is posted.
