There are several similar applications within the school bus student transportation applications in the USA.
In the photo, the Hindsight 20-20 system is installed in GA, this was a sonar-based backup safety system that was also requested when we performed the installation of the Professional Industrial Grade School Bus Video Surveillance Camera Solutions.

As many counties and some states are now contracting their student transportation needs to private contractors, our Private Service Contractor Charter Transport Compliance Bus Camera Systems are being equipped on these private transport buses that are operating under contract to transport students to and from schools and home.

By adding a "Driver Cam," which is simply another camera mounted over the driver's left shoulder on the ceiling of the bus, you now have a Driving While Texting (DWT) Bus Camera system. This system can help monitor the driver and stairwell activity to determine if the driver is distracted while driving students to and from school, in violation of federal distracted driver regulations. Driving While Texting (DWT) has become a serious safety issue with drivers of all passenger vehicles.