Definition

Adjective 1. Having a median strip or island between lanes of traffic moving in opposite directions: Describes a road or highway that is physically separated into distinct carriageways for traffic flowing in opposite directions, typically by a raised barrier, grass median, or concrete island.

Usage Examples

• Adjective:
  • The old two-lane road was upgraded to a modern dual-lane highway. (The road was changed from a single, undivided road to one with separate carriageways.)
  • For safety, the most heavily traveled routes are usually designed as dual-lane roads. (The busiest roads are often built with a physical separation between opposing traffic flows.)

Advanced Usage

• Technical/Engineering Context: In transportation engineering, "dual-lane" is a specific classification for a divided roadway, often contrasted with an undivided "two-lane" road (which has one lane in each direction but no physical median).
  • The project specifications call for the construction of a dual-lane arterial road.
• As a Modifier: The term is almost always used attributively (before a noun) to describe the type of road.
  • dual-lane carriageway, dual-lane freeway, dual-lane expressway

Variants and Related Words

• Divided highway (n): The most common synonym and standard term for a road with a median separating opposing traffic. "Dual-lane" is an adjective describing such a highway.
• Median strip / Central reservation (n): The physical barrier (grass, concrete, guardrail) that divides the lanes.
• Undivided highway (n): A road with no physical separation between lanes of opposite traffic.

Synonyms

• Divided: (e.g., a divided road).
• Separated: (e.g., traffic lanes are separated by a median).

Antonyms

• Undivided: Having no physical barrier between lanes of traffic moving in opposite directions.
• Single carriageway: A road where all lanes, for both directions, are on the same paved surface without a median.

Adjective

1. having a median strip or island between lanes of traffic moving in opposite directions
   • a divided highway