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Question:

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

A
Explaination

The reference markers are located every two-tenths of a mile, so motorists will always be in sight of a sign. Reference markers and mile markers are placed along the outside shoulder to mark the edge of the roadway and convey information to drivers about their location on the interstate for navigation and emergency situations.