Climate Change Branch

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State Climate Change Science & Guidance

The Climate Change Branch is dedicated to working with internal and external partners to ensure we stay at the forefront of climate research and projects. See below for the State's latest climate change science, guidance, and workgroups: 

California Climate Action Team (CAT)

Caltrans is a member of the California State Agency Climate Action Team. The CATs mission is to coordinate statewide efforts to implement global warming emission reduction programs, and implement the state’s Climate Adaptation Strategy. The CAT is subdivided into nine working groups, and Caltrans is a member of the Coastal and Ocean Climate Adaptation Team (CO-CAT), the Land Use and Infrastructure Working Group (CCLU-In), the Research Working Group, and the State Government Working Group.

Ocean Protection Council

Updated Sea-Level Rise Guidance - Draft

Catalyzed by direction from Governor Brown in 2016, the update to the State of California Sea-Level Rise Guidance (Guidance) reflects advances in sea-level rise science and addresses the needs of state agencies and local governments as they incorporate sea-level rise into their planning, permitting, and investment decisions. This policy document relies on the scientific findings from a recently released report from the Ocean Protection Council’s Science Advisory Team (see Science Report below).

Ocean Protection Council Website

The updated Guidance provides: 1) a synthesis of the best available science on sea-level rise projections and rates for California; 2) a stepwise approach for state agencies and local governments to evaluate those projections and related hazard information in decision-making; and 3) preferred coastal adaptation approaches.

Science Report

Rising Seas in California: An Update on Sea-Level Rise,” which synthesized the current state of sea-level rise science, including advances in modeling and improved understanding of the processes that could drive extreme global sea-level rise as a result of ice loss from the Greenland and Antarctic ice sheets.

California Coastal Commission

The California Coastal Commission’s Sea Level Rise Guidance was released in 2015 and provides the recommended methodology for addressing sea level rise in Coastal Commission planning and regulatory actions.

National Academy of Sciences (NAS) Study of Sea-Level Rise by the National Research Council (NRC)

California Executive Order S-13-08 directed state agencies to plan for sea-level rise and coastal impacts, and it also requested the National Research Council (NRC) to establish a committee to assess sea-level rise to inform these state efforts. The states of Washington and Oregon, the U.S. Army Corps of Engineers, the National Oceanic and Atmospheric Administration, and the U.S. Geological Survey subsequently joined California in sponsoring this study to evaluate sea-level rise in the global oceans and along the coasts of California, Oregon, and Washington for 20130, 2050, and 2100. To view the study, please click here.

Climate Registry

The Climate Registry is the leading voluntary greenhouse gas (GHG) registry in North America. The Registry provides tools and guidance for organizations to measure their GHG emissions. Caltrans gained the prestigious title of Climate Action Leader, in 2007 when the Department reported emissions and had them third party verified. As a member, Caltran's continues to annually calculate greenhouse gas emissions produced by Department facilities and operations.

Caltrans Climate Change Workgroup

The Climate Change Branch organized an internal workgroup comprised of various Divisions to discuss climate change issues important to the Department. The Climate Change Workgroup acts as the clearinghouse for climate change policy and a decision-making forum to discuss climate change issues that could effect the Department.



Program Contacts

Reza Navai
Assistant Division Chief
(916) 654-3330
Tracey Frost
Chief, Office of Smart Mobility and Climate Change
(916) 654-8175
Julia Biggar
Senior Transportation Planner
(916) 654-6344
Dillon Miner
Associate Transportation Planner
(916) 653-4287


Statewide Alerts and Other Information

Contact Information

Physical Address:

Department of Transportation
Transportation Planning
1120 N Street
Sacramento, CA 95814

Mailing Address:

Department of Transportation
Transportation Planning
MS #32
P. O. Box 942874
Sacramento, CA 94274-0001

Tracey Frost
Chief, Office of Smart Mobility and Climate Change
Caltrans Division of Transportation Planning 
Phone 916-654-8175

OSMCC Staff Contacts

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