Weight Limit sign
Vehicles heavier than the number posted may not cross this bridge or use this road.
Found at the approach to older bridges, timber structures and rural roads with a weak subgrade, sometimes stated as gross vehicle weight and sometimes as weight per axle.
How to recognise it
This sign is a tall rectangle in white, the standard background for a rule you must obey. These carry the force of law. Ignore one and you have broken a traffic rule, not just a guideline. Most are white rectangles with black text, and the handful that are not, the stop and yield signs, get their own unmistakable shapes.
What the test wants you to know
Weight limit signs are almost always about bridge and pavement structure, not traffic safety, so the number reflects an engineering limit rather than a speed or visibility concern. Ignoring one is a common cause of bridge damage, which is why it often carries a separate, larger fine than a typical moving violation.
Practise it
Reading about a sign is not the same as recognising it in half a second with an examiner watching. Every state road signs test on this site shows the sign and asks you to name it, then shows four faces and asks you to pick the right one.