What does this sign mean?

Possible Answers:

a. New speed limit 20 mph

b. No vehicles over 30 tonnes

c. Minimum speed limit 30 mph

d. End of 20 mph zone

Think you know the answer to this theory test question?

Crown copyright material is reproduced under licence from the Driver and Vehicle Standards Agency, which does not accept any responsibility for the accuracy of the reproduction. The Driver and Vehicle Standards Agency does not endorse in any way any advertisement displayed on this website.