Another Idea I had, not really an invention as the technology is available, but install ALPR (Advanced License Plate Recognition) cameras on school buses, and have them snap pictures front and rear of every car that passes a school bus when the stop sign is extended, and mail the offenders tickets. People object to red light cameras, and speed cameras, but people that almost ran over your kid? Who's going to protest that one?
I think it would be a great idea, and if became standard on all US school buses no one would dare pass one that is letting kids off the bus with the stop sign out.
I sometimes wish I had ALPR cameras installed in Fire trucks, ambulances, and police cars for the idiots who come to a complete stop and block emergency vehicles responding with lights and siren because they had a complete brain fart and thought the best thing to do was come to a complete stop and block the intersection. I actually had to arrest someone once for refusing to sign a ticket for failure to yield to a fire truck. She pulled out on a no turn on red, in front of a fire truck responding lights and siren, and the fire truck hit her. The firefighters stayed just long enough to make sure she wasn't injured, then left to continue to the call. I had been following the fire truck and stopped with the woman. She got ****ed when I started writing her a ticket, and then she refused to sign it. She felt that she was the victim and I should be writing the firefighter a ticket, even though I pointed out the no turn on red sign she ignored, and that the truck had it's lights and siren on. So she spent the night in jail and her car got towed to impound. She went to court and told the judge that I should have wrote the firefighters for felony hit and run. The Judge laughed her right out of court.