A yellow left-curve sign with a 25 MPH plaque means:

Correct answer: D – The road curves left, with an advisory speed of 25 mph
The warning symbol shows that the roadway curves to the left. The 25 MPH plaque displays an advisory speed determined for the roadway condition; it is not a minimum-speed instruction. Advisory-speed plaques supplement warning signs and are different from regulatory speed-limit signs.
Source: Manual on Uniform Traffic Control Devices, 11th ed. — § 2C.59, “Advisory Speed Plaque (W13-1P) and Confirmation Advisory Speed Plaque (W13-1aP)”, New York State Driver’s Manual — Ch. 4, “Warning Signs”




