From Wikipedia, the free encyclopedia
A dual carriageway is a type of road. It is an important route that usually carries long-distance traffic.
A dual carriageway has four lanes (2 lanes each side), and is always separated by a man-made barrier or strip of land.
- "Cambridge Dictionaries Online: Cambridge Advanced Learner's Dictionary: hard shoulder". Cambridge University Press. http://dictionary.cambridge.org/dictionary/british/hard-shoulder. Retrieved 2011-03-05.
- "Hard Shoulder Safety". Green Flag Motoring Assistance. p. 3. http://www.greenflag.com/downloads/hardshoulderguide.pdf. Retrieved 2011-03-05.