What's the meaning?

This task is about identifying the meaning of a range of signs and symbols.

Question 1Change answer

a) All of the signs above have a similar meaning. What is that meaning?
 
b) Write down one thing about the signs above that looks the same.
 

Question 1Change answer

c) All of these signs have a similar meaning. What is that meaning?
 
d) Write down two things about these signs that look the same.
 

Question 1Change answer

e) Both of these signs have a similar meaning. What is that meaning?
 
f) Write down two things about these signs that look the same.
 
g) What are two ways that signs are better for giving travellers messages than written instructions?