BART will replace lights in the Transbay Tube on Sunday, reducing service to one track for riders using the tube connecting San Francisco and Oakland.

The Blue, Yellow, and Orange lines will remain in service Sunday, while the Red and Green lines will not be in service. A Yellow Line shuttle train will operate between SFO and Millbrae.

Crews did similar work on two previous Sundays in April and June.

Trains will run every 30 minutes systemwide, and BART strongly encourages riders to plan accordingly.

The BART Trip Planner at bart.gov will be updated to reflect the schedule changes for Sunday.

A graduate student at UC Berkeley's Graduate School of Journalism, Emily focuses on business and health reporting. She is especially interested in covering economic and community development issues in Contra Costa County.