Cal. Vehicle Code § 40831 : California Vehicle Code — Offenses And Prosecution — Illegal Evidence — Civil Actions — Proof of excess speed Date: 7 Sep 2016 TEXT PDF Current through the 2016 Legislative Session 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. Ca. Veh. Code § 40831