Having a median strip or island between lanes of traffic moving in opposite directions(adjective)
WordNet. Princeton University. 2010.
Use "dual-lane" in a sentence
"We were driving a dual-lane avenida yesterday, towards the Muelles Las Garzas and Los Sauces, when we came upon an imposing, abandoned two-storey bulding, like a disused and neglected hotel."
"From what I heard recently, the planned Silvertown Link, if it gets built, will appear alongside the Blackwall Tunnel approach... so it will make the existing dual-lane carriageway seem like a country lane in comparison."
"Now that there is a magnificent highway .... [changes thought] They were going to have a dual-lane highway, and they will have it in the future."