Quote Quoting VC 22350.
No person shall drive a vehicle upon a highway at a speed greater than is reasonable or prudent having due regard for weather, visibility, the traffic on, and the surface and width of, the highway, and in no event at a speed which endangers the safety of persons or property.
He can take the position that your speed was unsafe, while noting that you were driving at a speed 30 MPH over the advisory limit.