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Question:

A _________ indicates the outer edge of a roadway, and it may be crossed only by traffic moving to or from the shoulder.

A
Explaination

The right edges of many roadways are marked with a solid white line. This line indicates the outer edge of the roadway, and it may be crossed only by traffic moving to or from the shoulder. On a divided roadway, the "inner edge" (i.e., between the left lane and the divider) is marked with a solid yellow line.