Work is moving forward on a section of Hwy 46 East in northern San Luis Obispo County.
Caltrans District 5 crews are at work turning the two lane highway into a four lane expressway, officials shared on Twitter Wednesday.
The section of highway up for construction runs for roughly five miles from the Shandon rest area to east of the Jack Ranch Cafe.
Caltrans officials are calling the current phase of the project "earthwork". Most of the construction is taking place away from the highway, which minimizes the project's effect on drivers.
In total, the project will cost $116 million.
When the project is finished, Hwy 46 East will be a four lane divided highway from Paso Robles to Lost Hills in Kern County.