Warning signs indicate potential hazards ahead and should always be heeded. When a Warning sign is displayed, anticipate any hazards and make sure you adjust your speed and vehicle position accordingly.

Warning signs consists of triangular Warning signs (black symbols on a white background with a red border) that indicate hazards ahead and Hazard markers at or near the hazard itself (various colours). Temporary Warning signs have a yellow instead of a white background.

Road layout signs depict the road layout ahead in relation to the road you are on. 

Examples of Road Layout Warning sign includes Intersection Ahead (see Intersection Ahead below), Sharp Exit Junction Ahead (see Sharp Exit below), and One Way Road becomes Two-Way Road (see 1-to-2 below).

Direction of Movement signs warns of the direction vehicles travel on the road ahead. There are broadly four types of changes these signs warn of:

1. Curves and bends
2. Direction of traffic
3. Reduction in lanes
4. Concealed driveways

Examples of Direction of Movement Warning signs include Traffic Circle Ahead (see Traffic Circle below), Sharp Bend to the Right Ahead (see Sharp Right below), Two-Way Traffic Ahead (see Two Way below), and Concealed Driveways Ahead (see Concealed below).

1. People (children, pedestrians)
2. Animals (wild vs. farm)
3. Gates and objects
4. Restrictions (height, weight, length, width)
5. Types of vehicles
6. Road condition

Examples of Symbolic Warning signs include Traffic Lights Ahead (see Traffic Lights below), Pedestrian Crossing Ahead (see Crossing below), Farm Animals Ahead (see Farm Animals below), Speed Bumps Ahead (see Speed Bumps below), Road Narrows from the Left Ahead (see Road Narrows below), Steep Hill Upwards Ahead (see Steep Hill below), and Width Restriction Ahead (see Width Restriction below).

Hazard Markers are found at or near the place of hazard. Signs are of different shapes. Permanent signs are red and white and temporary signs are yellow and black.

Examples of the most common Hazard Markers include Hazard to the Left – Keep Right (see Hazard to Left below), Dual-Lane Railway – Stop and Proceed with Caution (see Proceed with Caution below), Turn Right or Left Here (see Turn Right or Left below), and End of the Road (see Road Ends below).