The highway code, the official rules for road use in the UK, reads:
(General Rules, 160) “keep to the left, unless road signs or markings indicate otherwise. The exceptions are when you want to overtake, turn right or pass parked vehicles or pedestrians in the road”
(Motorway lane disciple, rule 264): “Keep in the left lane unless overtaking. If you are overtaking, you should return to the left lane when it is safe to do so (see also Rules 267 and 268).”
Many other EU countries have the same rules. I wouldn’t know about America.
The highway code, the official rules for road use in the UK, reads:
(General Rules, 160) “keep to the left, unless road signs or markings indicate otherwise. The exceptions are when you want to overtake, turn right or pass parked vehicles or pedestrians in the road”
(Motorway lane disciple, rule 264): “Keep in the left lane unless overtaking. If you are overtaking, you should return to the left lane when it is safe to do so (see also Rules 267 and 268).”
Many other EU countries have the same rules. I wouldn’t know about America.