I suggest taking advantage of VC 21212(d), which says, "Any charge under this subdivision shall be dismissed when the person charged alleges in court, under oath, that the charge against the person is the first charge against that person under this subdivision, unless it is otherwise established in court that the charge is not the first charge against the person."
That's a freebie, and you can only take advantage of it this time.
You cannot, for example, argue that the Vehicle Code knows about "sidewalks" (VC 21210) but neither 21212(a) nor SHC 890.4 mention "sidewalk", lose, then use the VC 21212(d) exemption next time. It is only offered for your first charge.

