Warning Signs

Warning signs alert drivers to a hazard or change in the road ahead — curves, intersections, deer and other symbols, railroad crossings, and roadway conditions such as pavement ends, slippery when wet, and no passing. Most are a yellow diamond with a black symbol, MUTCD-compliant and reflective on rust-proof aluminum. Choose a category below.

Best Selling Warning Signs

Browse Warning Sign Categories

Curve and Turn Signs 18 styles Curve, turn, winding road, and chevron alignment signs (W1).
Curve and Turn with Side Road Signs 12 styles Curve and turn signs with side-road arrows (W1-10).
Intersection Warning Signs 14 styles Cross road, T, Y, and circular intersection signs (W2).
No Outlet Signs 5 styles No outlet street and road signs (W14-2), plus private road and drive versions.
Dead End Signs 3 styles Dead End warning signs (W14-1) for streets with no through outlet.
Cross Traffic Does Not Stop Signs 6 styles STOP-sign plaques (W4-4) — cross, from-left, from-right, and oncoming traffic does not stop.
Advisory Speed Signs Custom MPH Yellow MPH advisory speed plaques (W13-1P) for curves, turns, and ramps.
Advance Traffic Control Signs 10 styles Stop, yield, and signal ahead warning signs (W3).
Symbol Warning Signs 25 styles Deer, pedestrian, animal, and other symbol signs (W11).
Roadway Condition Signs 27 styles Bump, dip, rough road, and pavement condition signs (W8).
Miscellaneous Warning Signs 19 styles Dead end, no outlet, and other warning signs (W14).
Railroad Crossing Signs 40 styles Advance warning, crossbuck, and railroad signs (W10).
Bicycle Path Signs 44 styles Bicycle warning and shared-path signs (W11).
Divided Highway and Clearance Signs 6 styles Divided highway and low-clearance signs (W6).
Hill and Vertical Grade Signs 9 styles Hill, steep grade, and truck grade signs (W7).
Merging and Ramp Signs 28 styles Merge, lane-ends, and ramp warning signs (W4).
Object Markers 24 styles Type 1, 2, and 3 object markers (OM series).
Supplemental Placard Signs 23 styles Advisory speed, distance, and arrow placards (W13/W16).
Pavement Ends Signs Pavement ends warning signs (W8-3) for paved-to-unpaved transitions.
Slippery When Wet Signs Slippery when wet warning signs (W8-5) for low-traction roads.
No Passing Zone Signs No passing zone pennant warning signs (W14-3).
Narrow Bridge Signs Narrow bridge warning signs (W5-2 and W5-3).
Road Narrows Signs Road narrows waring signs (W5-1).

Warning Signs FAQ

What are warning signs?

Warning signs alert drivers to conditions or hazards ahead - such as curves, intersections, animals, railroad crossings, or a change in the road surface - so they can slow down and react safely. They warn rather than command.

What color and shape are warning signs?

Most warning signs are a yellow diamond with a black symbol or legend. Temporary construction warnings are orange, and pedestrian, bicycle, and school warnings often use fluorescent yellow-green. Railroad and a few others use special shapes.

What is the difference between warning and regulatory signs?

Warning signs (yellow diamonds) advise you of a hazard ahead, while regulatory signs (usually white rectangles like stop, speed limit, and no parking) state a law you must obey. Warning signs prepare you; regulatory signs control you.

What are fluorescent yellow-green warning signs for?

Fluorescent yellow-green is used for the highest-priority vulnerable-user warnings - pedestrian, bicycle, school, and playground crossings - because the bright color stands out in all light conditions.

Are your warning signs MUTCD compliant, and what sizes do they come in?

Our warning signs follow MUTCD standards for shape, color, and symbols. Common sizes are 24x24, 30x30, and 36x36 inches; smaller and larger sizes are available for local roads or highways.

What are warning signs made of?

Signs are printed on rust-proof .080-inch aluminum with reflective sheeting (engineer grade up to high-intensity and diamond grade) so they stay visible day and night and last for years outdoors.