Caltrans updated the standard plans on 16 April 2021 to now include external exit tabs. It's plan S122 and they are officially called an Exit Plaque.
All of the overhead sign structures have been redesigned. There used to be separate sign structures for standard signs and CMSs. These have been consolidated into a new sign structure called the Versatile Truss.
The Versatile Truss comes in three different heights, or frame depths -- 60, 72, and 120 inches tall. These allow for a maximum sign height of 80, 180, and 240 inches, respectively.
Placing a 240 inch sign on a 120 inch structure will of course have considerable overhang. The sign panel will be centered vertically on the structure, as the overhang is designed to be equal above and below the sign structure.
This will lead to much larger sign panels being available for use on California freeways. They will also look different because the sign panels will extend below the bottom of the sign structure as they do in some other states.