Page 57 of the Rice Signs 2017 Traffic Safety Catalog covers the Work Zone Roadway Condition Signs — orange work-zone variants of the standard yellow W1, W6, W8, W16, and W24 MUTCD warning signs. These signs use the "c" suffix (e.g., W8-4c, W8-7c) to indicate the work-zone-orange background color required by MUTCD Chapter 6 for active construction zones. Categories on this page: W1-4 Combination Curve direction-change signs for advance warning of changing road geometry through a work zone (6 variants — bL, bR, cL, cR, LC, RC); W8 C-Variants for shoulder, gravel, uneven lanes, and grooved pavement conditions in work zones; W24-1 Lane Shift signs (6 variants including a- and b-suffix) for lateral lane shifts during construction; and W16-2cp distance plaques marking distance to a work-zone hazard (500 ft, 1000 ft, 1500 ft).