1. constructed or surfaced with macadam (a road surface made of layers of compacted stone or gravel bound with tar or asphalt)
Usage: chiefly historical or technical; often used in British English

Examples

• The macadamed road was smooth and well-maintained.
• Early macadamed highways revolutionized transportation in the 19th century.
• The town invested in macadamed streets to improve traffic flow.
• Before the road was macadamed, it was dusty and difficult to travel.
• The macadamed surface provided better traction in wet weather.