I know where every K-12 school is in my town, and have planned routes around them. This has also forced me to go to a supermarket that is further from my house, but worth it as it is a much better store, and they so far have no problem with me being armed inside. I do know where a couple of schools are in other towns that I frequent, and avoid those. But I would not have a reasonable knowledge
of all schools in towns that I drive to/through, and the law says I am not expected to.
A great example of this:
On Hwy 99, you pass within about 750-900' of Ceres High School (depending on which side of the freeway you are on. The school is not visible from the freeway, even if you know exactly where it is, and are looking for it.
If you are from out of town, you probably don't know where the school is, and it would not be reasonable to expect you to know. Even if you could see the school, you're flying by at 65 mph - you would be out of the school zone faster than you could possibly lock up your gun.
I have lived in the area for 20 years, went to an elementary school down the street from the high school, and have just posted here that I know exactly where the school is. I, therefore, would not be exempt from 626.9 in this case. (One reason I keep my lock box on the passenger seat when driving the 200' stretch of freeway that falls within the 'school zone.')