How do wildlife know to use animal bridges and crossings

Do animals really use those bridges to cross roads and highways? And how do they work to keep people and wildlife safe?

Why Aren't More Wildlife Crossings Being Built? - Uncommon Path – An REI Co-op Publication

Man-Made Animal Bridges and Crossings - Recruiting and Category Proposals - Geocaching Forums

Highway wildlife crossing in The Netherlands : r/europe

How do wildlife know to use animal bridges and crossings? - Yellowstone to Yukon Conservation Initiative

As Banff's famed wildlife overpasses turn 20, the world looks to Canada for conservation inspiration

The Pandemic Saved Wildlife. Can Road Crossings? - Bloomberg

Animals are Crossing: Who's Helping Wildlife Cross Roadways, and What New Federal Funding Could Mean - Grizzly bear conservation and protection

Other states have had success with wildlife bridges, so where are Wisconsin's? - The Badger Project

New Wildlife Bridge Coming to Los Angeles County

25 Animal Bridges That Are Saving Wildlife Across The World

Wildlife crossings stop roadkill. Why aren't there more? - Vox

Yes, Animals Really Use Tunnels and Bridges to Cross Roads - Bloomberg

Wildlife Crossings Save Lives and Money

Wildlife crossings can save animals. But do they make sense in Indiana?