Warning Signs: Reading Yellow Diamonds Before the Hazard
What this domain tests
Warning signs tell you what is ahead, not what the law demands right now. Kentucky's road network is dominated by rural two-lane highways, so curve, hill, intersection, and slippery-surface items appear often on the written test. The exam expects you to identify the hazard and the correct response.
Shape, color, and placement
- Yellow diamond - general warning. Fluorescent yellow-green - pedestrian, school, and bicycle warnings specifically.
- Curve (W1-2) - the arrow shows the direction of the bend. Chevrons (W1-8) repeat through a sharp turn. Reverse curve warns of two bends in opposite directions.
- Intersection (W2 series) - cross road, side road, T-intersection, and Y-intersection each have a distinct symbol.
- Road conditions - SLIPPERY WHEN WET, steep hill (with a grade percentage), divided highway begins or ends, lane ends, and loose gravel.
- S1-1 school pentagon warns that a school zone is ahead; the yellow-green school crossing sign marks the crossing itself.
Warning signs are placed so you have time to react: roughly 100–200 feet before the hazard in slow urban settings, and several hundred feet on 55 mph rural roads.
Worked example
You pass a yellow diamond showing a truck on a downgrade with an "8%" plaque. That means the road drops 8 feet for every 100 feet traveled. The correct response is to downshift into a lower gear before the descent begins and use engine braking rather than riding the brakes, which can fade and fail on a long grade.
Traps that cost marks
Reading a chevron as a speed sign (it points the direction, not a limit); assuming an advisory plaque is enforceable as a limit; treating a yellow sign as having no required action; and mixing up a warning diamond with an orange work-zone diamond.