Why California added nearly $19M to finish a wildlife bridge over U.S. 101

Wallis Annenberg Wildlife Crossing advances in California

The Wallis Annenberg Wildlife Crossing is a public-private project designed exclusively for wildlife. The crossing is being built over U.S. 101 near Liberty Canyon Road in Agoura Hills, creating a safer route for wildlife between protected habitats. Construction began in 2022 and remains active as of early 2026.

In February 2026, the state approved about $18.8 million in additional funding to help finish construction. Caltrans lists the project’s total programmed cost at roughly $92 million.

California wildlife bridge spans a ten-lane highway

The Wallis Annenberg Wildlife Crossing is being built directly over a ten-lane section of U.S. Route 101. This highway is one of the busiest corridors in California and creates a significant barrier for wildlife movement.

The crossing connects protected lands in the Santa Monica Mountains to the Sierra Madre Range. These areas were previously separated by traffic volumes that made safe animal crossings nearly impossible.

Construction began in 2022 with state support

Construction on the wildlife bridge officially started in 2022. The project has progressed in stages, with structural components now visible above the freeway.

Governor Gavin Newsom recently confirmed that funding for completion has been secured. This announcement cleared the way for final work to proceed as planned.

State officials report that the project remains on schedule for a fall opening. The bridge will become the first wildlife crossing of its scale in California once finished.

Wildlife crossing designed for animal movement

This California wildlife bridge is engineered specifically for animal use. It will be covered with native plants to mimic the surrounding landscape. Design plans show vegetation flowing naturally across the bridge surface. This approach encourages animals to use the crossing without fear or confusion.

The structure allows wildlife to move between habitats that were divided by highway construction decades ago. Restoring this connection supports healthier animal populations across the region.

Multiple species are expected to use the crossing

Project planners expect the bridge to support a wide range of animals. Graphics released by the project team show usage by bobcats, coyotes, mountain lions, mule deer, and desert cottontail rabbits.

Smaller species are also included in the design. Snakes, lizards, and toads are expected to benefit from the safe passage. By accommodating both large and small animals, the bridge addresses a broad ecological need. This inclusive design reflects the diversity of wildlife in Southern California.

Highway collisions kill thousands of animals yearly

Wildlife vehicle collisions are a serious issue in California. According to the University of California, Davis, more than 48,000 deer are killed by vehicles each year.

The same data shows that roughly 100 mountain lions die annually from vehicle collisions. In 2024, UC Davis reported that more than twice as many deer died from cars as from hunting.

These statistics highlight the scale of the problem. The wildlife bridge is intended to reduce these fatalities directly.

Wildlife collisions cost California over $200M

Beyond animal deaths, collisions carry high financial costs. UC Davis estimates that wildlife-vehicle collisions cost California more than $200 million each year. These costs include vehicle repairs, insurance claims, medical expenses, and emergency response services. Drivers and taxpayers share the financial burden.

Reducing collision frequency could lower these costs over time. State officials view the wildlife crossing as both a safety and economic investment.

Bridge aims to improve driver safety

Animal collisions pose risks to human drivers. Large animals like deer can cause serious accidents when struck at highway speeds.

By directing animals away from traffic lanes, the crossing improves roadway safety. This benefit applies directly to the U.S. 101 corridor. Transportation safety gains are a key justification for the project. Fewer collisions mean fewer injuries and reduced emergency response demands.

Native vegetation plays a critical role

Native plants will cover the bridge surface once construction is complete. These plants are chosen to match the surrounding environment. Vegetation helps animals feel secure while crossing. It also reduces noise and light exposure from traffic below.

The planted surface ensures the structure blends visually with nearby hillsides. This design supports both ecological and aesthetic goals set by the state.

Location links significant protected habitats

The crossing sits between two major protected areas. These include the Santa Monica Mountains and the Sierra Madre Range. Before the highway, animals moved freely between these regions. Decades of traffic disrupted migration patterns and reduced genetic diversity.

Reconnecting these lands supports long-term wildlife health. State planners cite habitat continuity as a core objective of the project.

California leads with the largest wildlife bridge

State officials describe it as the world’s largest wildlife crossing project, and it’s being watched as a model for future crossings in the U.S. California officials describe the bridge as a first-of-its-kind bridge in the state.

Its scale sets a precedent for future wildlife infrastructure projects. Other regions are watching closely. Success here could influence similar efforts nationwide.

Project shows shift in infrastructure priorities

The bridge reflects changing views on transportation planning. Infrastructure is no longer limited to human use alone. State investments increasingly take environmental impact and wildlife safety into account. This project demonstrates how roads and ecosystems can coexist.

The $19 million cost is framed as a long-term investment. Officials point to safety, ecology, and cost savings as returns.

For a very different take on bridge design and safety, explore which bridges across the country experts say are the most unsettling for drivers.

Wildlife bridge nears completion in 2026

As of early 2026, construction continues with a planned opening in the fall. Final connections and vegetation installation remain underway. The bridge will soon provide a permanent solution to a long-standing environmental challenge. Animals will cross safely above one of California’s busiest highways.

State leaders view the project as a model for future development. The crossing represents a new approach to balancing transportation and conservation.

For a look at how this idea is taking shape elsewhere, see how Colorado recently opened a major wildlife overpass on I-25, showing how fast the U.S. is scaling up these projects and what it could mean for future projects.

What do you think about why California is spending $19M on a bridge that no one will ever drive or walk across? Share your thoughts and drop a comment.

This slideshow was made with AI assistance and human editing.

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