imported post
Law enforcement already has the technology to create such maps. Sunnyvale PD already made one. I asked the police departments in Fremont, Newark, Union City, and Milpitas whether they would be able to create similar maps, and I was met with a whole lot of "we're under no obligation to create such maps, and we won't use our resources to do so". So, we are left to our own devices to create school zone maps.
I understand that there is reluctance from some to create such maps because they cling to the "knows, or reasonably should know, is a school zone" wording of Penal Code 626.9. While I readily believe that it is a legitimate argument to say that you didn't reasonably know that a school zone was within 1,000 feet, apparently there was a fairly recent court case in which an open carrier got into trouble, even though he did not know that he was in a school zone. Accordingly, knowledge is important.
If anyone does have the time and ability to create such a map, it would be crucial to include EVERY K-12 school, both public and private. Let's hope someone can do it.