A single carriageway (British English) is a road with one, two or more lanes arranged within a one carriageway with no central reservation/median strip...

example, a highway offramp). A single carriageway road (North American English: undivided highway) has one carriageway with 1, 2 or more lanes together...

dual carriageways. A road without a central reservation is known as a single carriageway regardless of how many lanes there are. Dual carriageways have...

distances between interchanges. Moreover, expressways might have single-carriageway sections in case of low traffic densities (as of 2024, such sections...

trunk road in Scotland, between Perth and Inverness from a single carriageway to a dual carriageway. According to this plan, the road will be widened from...

(113 km/h) on motorways, 70 mph (113 km/h) on dual carriageways, 60 mph (97 km/h) on single carriageways and generally 30 mph (48 km/h) (20 mph (32 km/h)...

to southwestern England, the A303 is frequently congested on its single carriageway sections. It passes through the Stonehenge World Heritage Site and...

the length of the M5 motorway, the A38 road runs alongside it as a single carriageway road. The road starts on the eastern side of Bodmin at a junction...

which the carriageways of the free-flowing road are separated, with left on- and offramps running between the carriageways and coming to a single at-grade...

is used to indicate the centre line of a single carriageway road or the lane markings of a dual carriageway or motorway. Red and amber cat's eyes denote...