Are the signs not delimited by day of week, time and month where you are? E.g.
7:30-18:30
Mon - Fri
Sep - Jun
Where I live, police can and will ticket you for speeding during those times. Regardless of if there's students around or if school is even in session or not.
In my state the school zone speed limit is only in effect if it's a school day and there are children around. If all the kids are all inside it's the normal speed limit. I guess Tesla could just use the school zone limit all the time during school times, but people would be annoyed.
At least in Georgia, there's at least one yellow light with a speed limit sign attached. During active school hours, the yellow light will flash on and off.
On my daily commute, there's two overhead flashing yellow lights. Previously, my Model Y would begin to brake and then speed back up, thinking it's a normal traffic light (prior to FSD). With FSD, it's at least smart enough to know not to brake; but it certainly doesn't read the speed limit from the sign, as it normally would.
Can be times of day, "when flashing", or "when children are present". Time of day isn't great because of irregular after school activities, events, delayed starts because of snow, etc.
The idea of present might be a difficult one. I'm not up to speed on any court cases that have determined what present means, but it's likely more nuanced than a simple "can Tesla identify a child in sight". A human would be more likely to play it safe and just obey regardless.
> On a school day when school children are present and so close thereto that a potential hazard exists because of the close proximity of the motorized traffic
This doesn't have to be state law, it can be municipal law. All it takes is city council putting up a sign that says "15 MPH when children are present".
>Are the signs not delimited by day of week, time and month where you are?
Depends on the locale. A lot of places just say "Speed Limit is X When Children Present", or "Speed Limit is Y when Lights [on the sign] are Flashing".
Yeah I've seen many such signs and it seems like the clear best approach. People should drive carefully around crowds of children and normally otherwise, regardless of some schedule posted on a given school's website.
Where I live, the school zone speed limits are only in affect when school is actually in session, and the yellow lights are flashing to let you know that it is (but we are also talking about the difference between 15MPH and 25MPH). Sounds like a plum income stream for your city's police department.
Where I live, the signs will state either a time of enforcement of school zones or "When Children Present". Generally, elementary schools will have school zones active during all hours that kids are on site. Middle Schools and high schools tend to be "When Children Present".
I believe signaling has a lot to do with the law in my state, since I'm living in a big city, the signaling is always present. And like I said before, the normal speed limit is 25MPH, so its not like normal traffic is too fast, it just goes down to 15MPH during school in and school out time (there aren't kids hanging around outside the schools otherwise, it is an urban environment).
> Are the signs not delimited by day of week, time and month where you are? E.g. 7:30-18:30 Mon - Fri Sep - Jun
In my local area the signs say either "during school hours", "while children are present" or they say nothing at all and you just have to know what hours and days the lower speed limit is enforced.
Where I live, police can and will ticket you for speeding during those times. Regardless of if there's students around or if school is even in session or not.