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Section 2C.31 Shoulder Signs
- The Shoulder Drop Off (W8-17) sign should be used where an unprotected shoulder drop-off, adjacent to the travel lane, exceeds 3 inches in depth for a significant continuous length along the roadway, based on engineering judgment.
- When used, shoulder signs shall be placed in advance of the condition.
- Additional shoulder signs should be placed at appropriate intervals along the road where the condition continually exists.
Source: 2009 MUTCD