The California Manual on Uniform Traffic Control Devices (MUTCD) was revised on March 29, 2019. Project construction signs must comply with the revised MUTCD or be removed by June 1, 2019.
For more information on the updated MUTCD, visit the Caltrans CA MUTCD page.
Also refer to the letter dated May 6, 2019 from Ray Zhang, Division Chief, Caltrans Division of Local Assistance.
