Bump Sign

Introduction

Not all hazards on the road are immediately visible—some lie in the pavement itself. The Bump Sign is a key warning tool used in Canada to alert drivers to a sudden rise or uneven surface ahead. This sign helps prevent vehicle damage and accidents, and it’s also an important symbol covered in the Ontario G1 driving test.

What Does the Bump Sign Mean?

The Bump Sign is a yellow diamond-shaped warning sign that features:

• A black horizontal bar with two or three hump-like peaks, symbolizing uneven road or a raised bump ahead

It warns drivers to reduce speed immediately and prepare for a rough or elevated section of pavement that could affect control or cause discomfort.

Where Are Bump Signs Typically Placed?

These signs are found in areas with known irregularities in road surfaces, including:

• Construction or maintenance zones

• Transitions between old and newly paved surfaces

• Residential neighborhoods with traffic calming measures

• Roadways with temporary patches or repairs

• Near railway tracks or bridge joints

They are placed far enough ahead of the bump to allow safe deceleration, following the Ontario Traffic Manual (OTM) Book 6 guidelines.

How Should Drivers Respond to the Bump Sign?

When you see this sign, you should:

• Slow down immediately to avoid bouncing or bottoming out

• Maintain both hands on the wheel to stay in control

• Avoid hard braking directly on the bump

• Watch for additional signs or cones if in a construction area

Ignoring this sign may result in:

• Vehicle suspension or tire damage

• Loss of control at higher speeds

• Increased risk of rear-end collisions from sudden stops

Visual Representation of the Sign

This sign features a bold black bump graphic across a yellow diamond background, designed for visibility and quick driver recognition.

Conclusion

The Bump Sign is more than a courtesy—it’s a warning that protects your vehicle, your safety, and other road users. Whether you’re navigating suburban streets, construction zones, or rural highways, recognizing this sign ensures a smoother, safer drive. It’s also a vital part of road sign knowledge for Ontario G1 test preparation.