Skip to Content
Streetsblog California home
Streetsblog California home
Log In
Freeways

Legislation Moves in Assembly to Loosen Environmental Regulations on Proposed Widening of SR 37

In 2023, the state passed a law to make it easier to build water and clean energy projects. Now some Assemblymembers want it to apply to a highway widening through environmentally sensitive marsh land.

Earlier today, the Assembly Water, Parks and Wildlife Committee advanced Assembly Bill 697, legislation that would allow for the construction of additional travel lanes on State Route 37 between Vallejo and State Route 121 in Sonoma County despite the project area running through protected habitats and wetlands. 697 would do this by amending legislation created to streamline permitting for clean energy and water infrastructure projects.

“Today, SR 37 has two lanes in each direction except for a 10 mile stretch where it has one lane, cresting a major bottleneck…adding an hour and a half to two-way commutes.,” claimed Assemblymember Lori Wilson (D-Suisun City), who both chairs the Assembly Transportation Committee and is the author of the bill.

Wilson went on to note that most of the people sitting in that traffic are workers making less than $17 per hour. Factoring in the time lost to sitting in traffic, that salary falls to less than $14 per hour. The route sees such congestion that transit agencies refuse to run service on the road as the congestion makes it nigh impossible to stick to a schedule.

The SR 37 widening is pitched as a temporary fix for the area while studies are completed on a larger highway project that may or may not come decades from now.  If funding is secured, SR 37 could begin construction in half a decade.

“Are we going to let perfection be the enemy of the good,” queried Committee Chair Diane Papan (D-San Mateo), when closing discussion and offering her support for the legislation.

But for a coalition of environmental groups and native tribes, the legislation is not good. Citing the damage that highway widenings cause the surrounding area and highway expansion’s long-term history of failing to reduce congestion; this coalition opposed not just the legislation but the widening project completely.

One of the ironies of the SR 37 widening is that it has been discussed for decades, and wouldn’t be under construction for another half a decade if funding becomes available, yet due to the impacts of global warming and climate change the project may have a short shelf life.

“The expanded roadway may only be used for ten years before it is permanently underwater,” testified Jeanie Ward-Waller, representing Transform, who is leading the coalition.

The project area of SR 37 runs at water level next to the San Pablo Bay and is regularly underwater during king tides. Given rising sea levels, it is hard to predict the exact timing of when the freeway will be covered in water, but fifteen years is an acceptable guess.

Or as Transform put it in a blog post explaining their opposition in 2022, building the project demonstrates “how to drown $500 million.”

But the opposition to both A.B. 697 and the eventual widening of SR 37 are not blind to the issues created by hours of gridlock, they just question road widening as the solution. Instead the offer two solutions of their own: 

First, the region needs to build more affordable housing in Sonoma County to reduce the number of workers driving from the currently more affordable Solano County.

Second, the region needs to invest in increased transit. In the long-term, future rail service is planned between Sacramento and the Bay Area. In the short-term, bus service should be added to the corridor.

Stay in touch

Sign up for our free newsletter

More from Streetsblog California

Enviro Groups Urge Gov to Reject Legislation Advancing Road Widening in Sonoma County Swamp

Given the strong support in the legislature, Caltrans, and the California Transportation Commission for the project it's unlikely the Governor will veto. But, that doesn't mean there aren't good reasons that he should.

September 18, 2025

Thursday’s Headlines

All the news from up and down the Golden State.

September 18, 2025

Talking Headways Podcast: Live from MARS To Change the ‘Crash First, Fix Later’ Mentality

Welcome to MARS: Modern Analytics for Roadway Safety. Let's talk about it in a special edition of the podcast.

September 18, 2025

How Many Americans Live in Walkable Neighborhoods?

...and how does your community measure up?

September 17, 2025

Metro Planning Committee Approves $85M for Bike/Ped Project Grants

The Metro Board Planning and Programming Committee approved $85.5 million for 16 grants to cities for walk and bike projects. Most make first/last mile transit connections and serve Olympics mobility.

September 17, 2025

Commentary: It’s Time to Recall Recalls

Tuesday's recall of Supervisor Joel Engardio proves the city really needs to take another look at its provisions.

September 17, 2025
See all posts