How COVID-19 Impacted Mobility in California

Analysis of cell phone location tracking data shows changes in how Californians have moved around since the pandemic.

2 minute read

April 7, 2021, 10:00 AM PDT

By Clement Lau


COVID-19 Restrictions

The Santa Monica Pier on March 23, 2020. | BrittanyNY / Shutterstock

How have the mobility patterns of California changed since March 2020 due to the pandemic? Mobile phone location data can help to answer this question. As reported by Phillip Reese, Google has compiled large amounts of cell phone location tracking data as part of its ongoing effort to help leaders around the world to gauge the impact of COVID-related closures and travel restrictions. Collected from phones with location trackers enabled, the mobility logs show patterns of trip frequency—available at national, state and regional levels—in daily snapshots from early 2020 through early March 2021. The baseline for comparison in terms of trip frequency is the first five weeks of 2020, before California and the United States initiated broad COVID-related restrictions.

Some of the key findings of this analysis are:

  • In the early weeks of 2021, Californians are staying home way more than we did in our pre-pandemic life. 
  • Californians are using cars rather than resuming pre-COVID commute patterns on public transit, i.e. buses and trains, which is a trend with troubling implications for transit services and the environment should it become long-standing.
  • As of early March 2021, travel for retail and restaurants was back to 26% below the baseline, while grocery and pharmacy trips were 11% below.
  • Work-related travel showed the most sustained disruption, at 33% below the baseline.
  • Californians are heading out to shop, dine, and work far more now than in March 2020, when the state issued its first sweeping stay-at-home order.

Please read the source article for more details, including informative graphs and maps.

Monday, March 15, 2021 in U.S. News & World Report

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

Overlapping highways

The state-sanctioned urbicide of Austin

People don’t kill cities. Freeways do.

September 8, 2026 - Benjamin Schneider

The Hoover Dam blocking the Colorado River. The river's water level is noticeably low. The cliffs surrounding the blue water are brown and jagged.

US to reduce Colorado River water deliveries to Mexico

A new Colorado Treaty amendment reduces Mexico’s Colorado River water allocation by 250,000 acre feet.

September 11, 2026 - The Arizona Republic

Skyscrapers in Jersey City.

New Jersey’s second-largest city bans standalone data centers

Jersey City will continue to allow co-location facilities, such as those meant for research institutions that store their own data.

September 4, 2026 - The Cool Down

A New Jersey train approaches people waiting at the station.

Amtrak not solely to blame for New Jersey commuter rail's unreliability, report finds

A new study from the Garden State Initiative found that NJ Transit’s budget grew 20% across a 4 year period, but reliability declined significantly over the same period.

September 15 - Mass Transit

A tall, gray power plant billows smoke into a blue sky.

EPA erases limits on planet-warming pollution from power plants

Under Monday’s plan, power plants would still have some limits on how much mercury, arsenic and other contaminants they can emit.

September 15 - New York Times

A white RAPID bus. The lower half is light blue, and says RAPID in purple text. The bus is half visible, appearing from the left side of the image.

Phoenix announces new on-demand transit service, more frequent RAPID buses

Both new services will launch in October, and are part of Phoenix's Project Effective Access Solutions for Easing Congestion.

September 15 - KJZZ

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.