WONDER #2261: What Is a Viaduct?

Question 1 of 3

In general, which is cheaper to build: viaducts or bridges?

1. bridges
2. viaducts
3. neither
4. both

Question 2 of 3

Are all bridges viaducts?

1. yes
2. no
3. definitely
4. maybe

Question 3 of 3

Viaducts are often used to carry what type of traffic over a valley?

1. railroad
2. unicycle
3. pedestrian
4. airplane

Check your answers online at https://wonderopolis.org/wonder/what-is-a-viaduct.