A yellow diamond sign shows a curving arrow bending 90 degrees. What does it indicate?

CHEVRON (RIGHT/LEFT CURVE) WARNING SIGN: The curved arrow or series of arrows indicates the radius and direction of an upcoming curve. A sharply bent arrow (approaching 90 degrees) indicates a more severe curve than a gently bent arrow. Drivers should: slow to a safe speed BEFORE the curve (not during it — braking in a turn is destabilising); look through the curve to the exit; follow the curve smoothly. SUPPLEMENTAL ADVISORY SPEED PLATE: Often posted below curve warning signs, a yellow diamond or rectangle shows the maximum safe speed for the curve — for example, 'CURVE / 25 MPH'. This advisory speed is calculated for standard passenger vehicles in dry conditions — adjust downward for rain, wet roads, or larger/higher vehicles.