double-lane

The compound adjective "double-lane" is a modern formation from two native English elements. "Double" traces back to Latin duplus, meaning "twofold," which entered English via Old French. "Lane" is a native Old English word for a narrow road or path. The compound logically combines these concepts to describe a road feature consisting of two parallel traffic lanes, typically to indicate increased capacity compared to a single lane. Its formation follows the common English pattern of combining a number prefix with a concrete noun to create a clear, descriptive technical term, primarily used in transportation and engineering contexts.

Structure: double (twofold) + lane (road division) double: From Old French doble, from Latin duplus (twofold, double). Functions as a quantifying prefix meaning "two" or "twice". lane: From Middle English lane, from Old English lane, lanu (a lane, a narrow road). Functions as the core noun, referring to a defined strip within a road for a single line of traffic.