A warning sign has a supplementary plate stating 'Reduce speed now'. Why is the plate used?
To state that the hazard has already ended
To create a permanent national speed limit
To tell drivers that the hazard requires a reduction in speed✓Correct answer
To reserve the road ahead for slow vehicles
Explanation
The plate tells drivers that the approaching hazard calls for an immediate speed reduction. It does not establish a new statutory maximum speed, which would require a regulatory speed-limit sign.