http://www.mercurynews.com/2017/02/14/cupertino-children-up-to-12-can-now-ride-bikes-on-sidewalks/
At a Feb. 7 meeting on Feb. 7, the city council voted 3-2 in favor of amending the municipal code to raise the minimum sidewalk riding age from 10 to 12.
Councilmen Rod Sinks and Steven Scharf cast the dissenting votes, citing safety concerns related to older children riding recklessly on sidewalks and cars backing out of driveways, among other issues.
Timm Borden, director of public works, told the council that the city was hearing concerns from parents about their middle school students riding in the street.