carriage way [sic]
- die Fahrbahn
carriageway drainage - die Straßenentwässerung
carriageway slab [tech.] - die Fahrbahnplatte
dual carriageway - Straße mit Mittelstreifen
dual carriageway - zweispurige Straße
dual carriage - der Doppelvorschub
carriageway - [Brit.] each of the two sides of a divided highway or expressway, each of which usually have two more lanes.
the part of a road intended for vehicles rather than pedestrians.
median (also 'median strip') - the strip of land between the lanes of opposing traffic on a divided highway.Chambers
reservation - ... 6 [Brit] a central reservation.
central reservation - [Brit] a narrow strip of grass, concrete, etc dividing the two sides of a dual carriageway, especially a motorway.
Google define:'divided highway' -
any highway with a physical barrier (such as jersey barrier or landscaped median) that separates the two directions of traffic is known as a divided highway. Divided highways may have four or more lanes. Divided Highways is also the name of a book and PBS series from 1996 that provided a glimpse of the politics and history behind the development of the nation's highway system.http://www.southeastroads.com/glossary.html
a highway divided down the middle by a barrier that separates traffic going in different directions; "in England they call a divided highway a dual carriageway" http://wordnet.princeton.edu/perl/webwn
A dual carriageway or divided highway is a road or highway in which the two directions of traffic are separated by a central barrier or strip of land, known as a central reservation or median. http://en.wikipedia.org/wiki/Divided_highway