The phrase "four lanes" typically refers to a roadway that has four designated lanes for vehicular traffic. However, there are a variety of synonyms that can be used to describe this type of road. A few options include "four-lane highway," "four-lane road," or "four-way street." Additionally, "dual carriageway" may be used in countries where this type of road has an alternate name. No matter what the synonym, these roads are designed to efficiently move large volumes of traffic in two directions. They are often found in urban areas, where congestion and traffic jams can be common, though they can also be found in suburban or rural settings.