Vehicle Code – VC 21360

Local authorities in their respective jurisdictions may, within the reasonable exercise of their police power and subject to Section 21353 , place and maintain official traffic control devices to regulate traffic at the intersection of a highway and a private road or driveway.  Official traffic control devices may be erected at or near such intersection, except no such device shall be erected upon a private road or driveway without consent of the owner thereof.  When official traffic control devices are installed and in operation, the private road or driveway shall be deemed a highway only for the purpose of determining the existence and location of an intersection.