Section 40831 Of Article 2. Civil Actions From California Vehicle Code >> Division 17. >> Chapter 3. >> Article 2.

. In any civil action proof of speed in excess of any prima facie limit declared in Section 22352 at a particular time and place does not establish negligence as a matter of law but in all such actions it shall be necessary to establish as a fact that the operation of a vehicle at the excess speed constituted negligence.