Standard: 01 The Lane(s) Closed sign shall be used in advance of that point where one or more through lanes of a multi-lane roadway are closed. 02 For a single lane closure, the Lane Closed (W20-5) sign shall have the legend RIGHT (LEFT) LANE CLOSED, XX FEET, XX MILES, or AHEAD. Where two adjacent lanes are closed, the W20-5a sign shall have the legend 2 RIGHT (LEFT) LANES CLOSED, XX FEET, XX MILES, or AHEAD.
Center lane closed ahead! Sign informs "center lane drivers" that they need to merge right or left to avoid construction. Signs increase safety.
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