You will need to consider these things:
1. Why does the animal need to cross the road?
2. How does the animal move, and what kind of surface would they need?
3. What habitat do the animals who will use the crossing live in, and what features of this habitat would need to be included in the design?
4. How will you attract the animals to that location and get them to use the crossing you build?
5. Which other animals might be able to use your crossing?
Wildlife bridges: See examples of many types wildlife crossings all over the world
More Wildlife bridges : See even more examples of many types wildlife crossings all over the world
Videos of Wildlife Using Crossings: Watch live camera of wildlife using various kinds of crossings.
California Set for Groundbreaking Wildlife Bridge: Watch a news story about how wildlife crossings save lives.
How Kids and Blue Ropes Saved Monkeys: Read and watch about how Kids Saving the Rainforest created the wildlife bridges.
Great Christmas lsland Red Crab Migration: Learn more about the crab bridges.
Here’s How That Internet-Famous ‘Fish Tube’ Works: Read this to learn more about how scientists and engineers solved problems for salmon and people.
Penguin Paths of New Zealand: Read about the penguin tunnels.
Wildlife Crossings, from Bridges, to Tunnels, to Overpasses: NewsELA article on wilidlife crossings.
There are Teeny Tiny Salamander Crossings in Massachusetts: Read about salamander crossings. Also here.
7 Animal Crossings Around the World: See pictures and short descriptions of the animal crossings.
Improved Wildlife Crossings Show a Huge Decline in Wildlife Collisions: See models of different kinds of crossings.
Turtle Crossings: See pictures of a turtle crossing and how one scientist found a way to attract the turtles to the crossings.
Great Christmas lsland Red Crab Migration: Learn more about the crab bridges.