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Reference markers are placed along the outside shoulder to mark the edge of the roadway. They give drivers information about

Correct answer

  • their locations on the roadway.
  • upcoming expressways.
  • the posted speed limits on the roadway.

Explanation

Reference markers are located every two-tenths of a mile so that drivers will always be in sight of one. They are placed along the outside shoulder to mark the edge of the roadway and give drivers information about their locations on the roadway for navigational and emergency purposes.

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