Caltrans Closes Busy Highway 101 On-Ramp for Two Months as Wildlife Crossing Nears Completion

Traffic anger is rising in Agoura Hills as a major northbound U.S. Highway 101 on-ramp closes for two months to make way for the Wallis Annenberg Wildlife Crossing.

Quick Take

Caltrans says the northbound Liberty Canyon Road on-ramp will be closed 24/7 for two months starting March 24, 2025.
The closure is tied to work on the Wallis Annenberg Wildlife Crossing, not a separate road project.
State and city officials say the project is meant to improve wildlife movement and reduce danger on the freeway.
The project has also become a flash point because drivers face delays while the crossing nears completion.

Ramp Closure Hits a Busy Route

Caltrans plans to close the northbound U.S. Highway 101 on-ramp at Liberty Canyon Road for two months, starting March 24, 2025. The agency says crews need the space to place rocks and landscaping materials on the Wallis Annenberg Wildlife Crossing west of Liberty Canyon Road. The city of Agoura Hills says the closure is part of an ongoing planned shutdown, not an emergency repair.

Drivers in the area are being pushed onto other routes while construction continues around the freeway. Caltrans has also said that freeway lanes may stay open during the day for most of the project, with some night work and detours as needed. That does not soften the real-world effect for commuters who use this corridor every day. For them, the closure is another reminder that major public projects usually deliver their benefits later than their pain.

Why Officials Say the Work Matters

Supporters describe the crossing as a safety and habitat project that helps wildlife move across the 101 Freeway more safely. The project is meant to reconnect fragmented habitat in the Santa Monica Mountains area and reduce the chance that animals will be hit on the road. Caltrans and project partners have framed the work as long-term environmental repair, even as they manage short-term traffic disruption.

The project has also moved into its final construction stretch, which helps explain why closures are still happening this late in the process. Reporters have noted that the work has included heavy beams, concrete pours, and closures on both the freeway and nearby roads. That mix of delayed benefits and visible disruption is why projects like this so often trigger public frustration long before they win praise.

Cost, Delays, and Public Frustration

The crossing has become a symbol of a wider fight over what government builds, how long it takes, and who pays for it. Recent reporting says the project’s price tag has grown to about $114 million, up from earlier estimates near $92 million, with construction now expected to finish later than first planned. Critics use those numbers to argue that big public projects keep getting more expensive while taxpayers and drivers absorb the fallout.

At the same time, the project still has real supporters who see it as a rare example of infrastructure serving both safety and conservation goals. That split helps explain the sharp tone around the ramp closure. People stuck in traffic see delay and waste. Project backers see a necessary tradeoff for a crossing that could help wildlife for decades. Both reactions are rooted in the same basic fact: the closure is real, and so is the construction behind it.

What Happens Next on the Freeway Corridor

Caltrans says the Liberty Canyon Road on-ramp shutdown is temporary and linked to the ongoing buildout of the wildlife crossing. The agency’s public notices show that other closures have already affected nearby roads and stretches of the freeway, and more traffic control may follow as the project moves toward completion. For nearby residents and drivers, that means the slowdown is not a one-day event but part of a longer construction season.

On Monday, August 3 to Friday, August 7, from 9:00 a.m. to 3:00 p.m., the northbound U.S. Highway 101 on-ramp at Liberty Canyon Road will be closed for construction related to the Wallis Annenberg Wildlife Crossing.

➡️ Please use the Lost Hills Road or Chesebro Road northbound… pic.twitter.com/HDOcjA8LhM

— City of Agoura Hills (@CityAgouraHills) August 1, 2026

For many Californians, this story lands in familiar territory. A public project promises a future benefit, then asks local people to pay the price in time, noise, and frustration. The Wallis Annenberg Wildlife Crossing may eventually prove its worth. For now, the most immediate impact is simpler: one of the area’s key freeway ramps is closed, and the traffic headache is already here.