Rule 136 ↗
Where a single carriageway has four or more lanes, use only the lanes that signs or markings indicate.
Dual carriageways
A dual carriageway is a road which has a central reservation to separate the carriageways.
Road Rules :
Last updated:
📜 Highway Code Regulation
🚘 Independent revision guide
🌐 Multi-Language Translation Support
📖 Rule 136 Full Regulations & Explanation
Text shown in the rule image
Road Rules :
Multi - Lane Single Carriageways and Dual Carriageways
SINGLE CARRIAGEWAYS WITH 4+ LANES
UNDERSTANDING DUAL CARRIAGEWAYS
What is a Dual Carriageway ?
A road is classified as a dual carriageway when it features a central reservation that physically divides the two carriageways .
Follow Signs and Markings
On any single carriageway featuring four or more lanes , drivers must strictly adhere to the specific lanes indicated by road markings or overhead signs .
The Central Reservation Divider
The presence of the central reservation is the key identifier that separates a dual carriageway from a standard single carriageway .