A red octagon sign universally indicates a stop. Drivers must come to a complete stop at the intersection and proceed only when it's safe.
A yellow diamond-shaped sign with a curved road symbol warns drivers of a sharp curve ahead. You should reduce your speed and be ready for the change in direction.
A green circle with a white arrow indicates that going straight is allowed, and it's a directive or a permissive signal rather than a restriction.
A yield sign requires drivers to slow down and give the right-of-way to other vehicles and pedestrians. You do not need to stop unless necessary to avoid a collision.
A flashing red light functions like a stop sign. Drivers must come to a complete stop and proceed through the intersection only when it is clear and safe to do so.