Definition of road tester in US English:

road tester

noun

  • 1Something, now especially a purpose-built machine, which tests the condition or quality of a road.

  • 2A person who or thing which road-tests something.

Origin

Late 19th century; earliest use found in The Daily Evening Bulletin. From road + tester.

Pronunciation

road tester

/ˈrəʊd ˌtɛstə/