We suffer from what might be considered a plague. A rash of incidents in which a child was forgotten in the back seat of a car and left to bake on a hot day.

A recent law proposal to deal with this has been under discussion, and after some initial support it looks like that probably isn't going to pass. The main opposition to the bill is that it is not right to move the responsibility of the children from the parents to the day care center and teachers. Also, it is not right to move criminal responsibility to the teachers when they aren't even with the kids and it is the parents who forgot them - if the law is placing the onus on the teachers, it will also place the liability on them. And  if they can't get hold of the parent, if he or she doesn't answer the phone, or the line is busy or whatnot, and suddenly the ganenet is on the hook for the parents distraction and forgetfullness.

So it looks like that law won't pass, and another law is needed in its place.

MK Ayelet Nahmias-Verbin (Hamachane Hatzioni) has proposed a law that would require all cars to have a sensor installed that will beep and alert the driver at the end of the ride that there is a child in the back seat. The sensor will continue to beep until the child is taken out of the back seat.

Nahmias-Verbin's proposal comes after her participation in the NRG-sponsored trial placing 7 Israeli public figures in hot cars for 10 minutes (video posted earlier).

Nahmias-Verbin compares this proposed requirement to the requirement of keeping a yellow vest in the car.
source: NRG

Anything that might help is worth trying, and a sensor is probably the best overall solution. Details would have to be worked out, such as requiring all new cars to have it factory installed, along with some stage of requiring cars already on the road to have them installed by a certain deadline. Obviously the annual test would have to look for the sensor and check that it works as part of their inspection.