The Caltrans Standard Plans are the graphic standards from the State of California Department of Transportation. This reference is filled with large drawings that show everything from the placement and specs of temporary crash cushions and overhead freeway signs to planting and irrigation details.
All the dimensions are here as drawings so you can visually sense and see what the specifications are and how they're applied in all highway construction situations.
The Caltrans Standard Plans contains important specifications regarding:
Excavation and backfill
Metal beam guard railing around embankments and structures
Walls and fences
Curbs and curb ramps
Pipe and arch culverts
Planting and irrigation
Temporary traffic controls
Temporary water pollution control
And much more!
You'll find every specification necessary for designing, constructing, or maintaining local streets and roads in the 2018 Caltrans Standard Plans.