CalTrans

Carpool lane on freeway in Pasadena, California.

Another Reminder of the Futility of Carpool Lanes

What's the great 'fix' for the flawed Highway 101 carpool lanes in Marin and Sonoma counties in the Bay Area? Reduce the HOV time by two and a half hours during the peak commutes to enable solo drivers greater access to 52 miles of widened freeway.

March 13, 2026 - San Francisco Chronicle

Traffic on a freeway heading into downtown Los Angeles on a sunny day.

Report: Caltrans Models, Which Guide Billions in Transportation Funding, are Inaccurate and Outdated

Many of the predictive models used by California’s transportation agency fail to account for post-pandemic travel patterns and induced demand.

November 16, 2025 - State Smart Transportation Initiative

Silver sedan in carpool lane on California freeway on sunny day.

When Carpool Lanes Cause Mayhem

A newly widened Bay Area freeway serves as a reminder of the futility of HOV lanes. There are better ways to manage and mitigate traffic.

October 24, 2025 - Irvin Dawid

Highway 101 winding through redwood trees with road sign for Eureka, CA partially visible in top right.

Caltrans Plans $2 Billion Tunnel to Save Crumbling Coastal Highway

A roadway connecting Eureka and Crescent City is a lifeline for local residents, but its future is uncertain as rock slides force repeated closures.

July 29, 2025 - San Francisco Chronicle

Close-up of "Shared Use Path" sign for pedestrians and cyclists on post in urban setting.

California Adds Complete Streets to Transportation Funding Guidelines

The state transportation commission previously declined to include bike and pedestrian infrastructure in its updated funding guidelines, despite a new state law requiring Complete Streets efforts in all Caltrans projects.

December 13, 2024 - Streetsblog California

Woman pressing beg button at crosswalk about to cross street.

California Governor Signs Complete Streets Bill Into Law

The state’s transportation agency will be required to prioritize multimodal transportation infrastructure and improve transparency.

September 30, 2024 - Streetsblog California

Interstate 5 freeway in Los Angeles, California.

Opinion: LA Should Reject ‘Misguided’ Car-Centric Policies

Even as the city highlights clean energy and transportation for the 2028 Olympics, Metro and Caltrans move forward with plans to expand highways.

September 11, 2024 - Streetsblog Los Angeles

Bike lane marked with white paint on asphalt street.

Zeroing in on California’s Incomplete Streets

A report highlights the lack of enforcement of Caltrans’ Complete Streets policy in projects around the state.

July 24, 2024 - Streetsblog California

Aerial view of massive Los Angeles freeway interchange.

Audit: Caltrans Ignored Red Flags Before Freeway Fire

A lax inspection schedule contributed to the hazardous conditions that led to the massive blaze that shut down Interstate 10 in Los Angeles last year.

June 10, 2024 - Spectrum News 1

Field of yellow mustard in flower with Yolo Causeway elevated highway in background with truck passing by.

Caltrans Sued Over I-80 Expansion Plan

Environmental groups argue that the agency purposely split the project into two phases to obscure the true impact of expanded road capacity.

June 3, 2024 - Streetsblog California

Google street view of American Avenue overpass over Highway 99 in Fresno, California.

Transportation Secretary Orders Review of Fresno Highway Project

The decision follows a lawsuit by local groups who say Caltrans should not have exempted two interchange expansions from environmental review.

January 17, 2024 - Fresnoland

Bird's eye view of moderately busy large freeway interchange in California.

Opinion: California Must Walk the Walk on Transportation Emissions

While state leaders tout their climate goals at COP28, residents back home continue to fight highway expansion projects that induce traffic and increase emissions.

December 11, 2023 - Streetsblog California

Aerial view of freeway crossing river in Sacramento, California with colorful sunset sky in background.

Tollways for Sacramento?

Road pricing terminology can be confusing, particularly since Californians see so little of it. For example, a Sacramento TV station calls proposed express lanes on Interstate 80 from Solano County to Sacramento a ‘tollway.’

November 20, 2023 - KCRA

Close-up of green Interstate 5 freeway sign pointing to Redding and Sacramento.

Caltrans Forges Ahead With Freeway Widening Proposal

Despite the state’s commitments to reducing driving and roadway expansions, Caltrans is proposing an expansion of Interstate 5 in far northern California.

November 14, 2023 - Streetsblog California

Close-up of Caltrans logo on white passenger train

Caltrans Demotes Official Who Challenged Road Expansion Projects

An employee was reassigned after bringing up concerns about highway projects that she alleges improperly skirted environmental review.

October 8, 2023 - Politico

Traffic on the 405 interstate freeway through the Sepulveda Pass at Getty Center Drive in Los Angeles, California

Report: Bike Lanes Can't Make up for New Roads

If California wants to meet its climate goals, the state must stop funding its myriad road construction and expansion projects.

September 29, 2023 - Streetsblog California

Close-up of Caltrans logo on white passenger train

The ‘Three Pillars’ of Carbon Reduction, According to Caltrans

The California Department of Transportation released its draft carbon reduction strategy last month to apply for Carbon Reduction Program funds included in the Infrastructure Investment and Jobs Act. Road pricing plays a prominent role.

August 9, 2023 - CalTrans

A highway sign reads with directions to reach San Francisco to the north and San Jose to the south--both on Highway 101.

101 Freeway in California Slower Than Ever After Widening, Locals Say

Induced demand strikes again.

April 19, 2023 - Streetsblog SF

Protected Bike Lane Los Angeles

Caltrans Releases Complete Streets Action Plan

The agency’s detailed list of actions highlights the many changes needed to truly implement Complete Streets principles into California road construction and maintenance.

July 19, 2022 - Streetsblog California

Smog hovers in the air in the background of this image of heavy car traffic on the 405 Freeway near ints intersection with the 710 Freeway in Southern California.

Southern California Freeway Expansion Plans Scrapped

After more than a decade of planning, Caltrans has officially dropped the I-710 Corridor Project, a plan to widen Interstate 710 for a long stretch of the freeway near the ports of Los Angeles and Long Beach.

May 30, 2022 - Los Angeles Times

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.

Community Development Director

City of Wisconsin Rapids

Professor of Urban Planning

Harvard University Graduate School of Design

Transportation Planner I

KFH Group Inc.

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