Mule deer already using incomplete $20 million wildlife bridge in California
Camera traps caught three mule deer crossing a new wildlife bridge in Siskiyou county before final fencing was finished.
Intelligence analysis by GPT-5.4 Mini
California’s first wildlife crossing over a major highway is already attracting animals. The project is meant to reduce roadkill and improve safety, but the article notes the surrounding fencing still needs finishing.
A new animal bridge in California is already being used by deer, like a safe hallway over a busy road. It helps animals cross without getting hit by cars, but the fences nearby still need finishing so more animals will find the bridge.
Analysis
What happened
A camera trap in Siskiyou county recorded three mule deer using a new wildlife bridge over Route 97, even though the project is not fully finished yet. The Guardian says this is the first wildlife crossing built over a major highway in California.
Why the structure matters
The bridge is designed to help migrating mule deer, elk, and other animals move safely across the road while also reducing crashes for drivers. Fraser Shilling of the Road Ecology Center at UC Davis said the site gives researchers a chance to study how to make wildlife crossings work better.
The unfinished part
The bridge itself is done, but some of the adjacent fencing still needs to be completed. That detail matters because, as Shilling noted, a crossing alone does not stop roadkill. The fencing helps guide animals toward the bridge instead of letting them wander onto the highway.
The scale of the problem
The article cites a 2024 report saying California drivers kill nearly 50,000 mule deer each year, about 10% of the state’s deer herd. It also says nearly 100 mountain lions die annually in vehicle crashes, along with thousands of other animals. At this crossing site alone, Caltrans said about 50 deer and 16 elk died from 2015 to 2020.
What comes next
More crossings are planned, including the Wallis Annenberg wildlife crossing in southern California, which the article says is expected to become the world’s largest when it opens later this year. The piece presents the Siskiyou county bridge as an early proof point for a wider transportation-and-conservation strategy.
Key points
- A camera trap recorded three mule deer using California’s new wildlife bridge in Siskiyou county.
- The bridge crosses Route 97 and is the state’s first wildlife crossing over a major highway.
- Final fencing is still being completed, and that fencing is needed to funnel animals onto the bridge.
- Caltrans and researchers say the project is meant to reduce animal deaths and improve driver safety.
- The article says more wildlife crossings are planned in California, including a much larger one in southern California.
If the fencing is completed and the crossing continues to work, fewer animals should be killed on Route 97 and fewer drivers should face dangerous collisions. The article also suggests the bridge could help California learn how to build better crossings in the future.
If the surrounding fencing is not completed or does not guide animals well, the bridge may not prevent much roadkill. The site could also remain a danger until the full system is finished, even though some wildlife is already using it.
