It can be confusing when you drive on a dual carriageway and the national speed limit sign is shown ( white sign with black stipe through it) it means 70 on a motorway but is less on a carriageway Why can’t they simply show the actual limit like all other signs (20,30,40) this is especially confusing to any visitor to the country.
Replace all the national speed limit signs with normal speed signs ( with an actual speed limit number on it ) e.g. 70