An electronic substitute bus driver system for school buses to provide improved student safety and student control. Embodiments can monitor cargo temperature with remote sensor and air temperature to adjust air delivery speed or cooling capacity. The verification module is also structured to apply a reward credit in association with only a first user whose user information is associated with the unique unit identifier for the select media storage device. The handle is provided with a number of manually operated switches, including an ONOFF switch, an audio transmit switch, a flashlight switch, a camera switch and an infrared switch. The discharge pressure and suction pressure are further monitored and the compressor is inhibited from being reloaded for a predetermined time delay. In this way the formation of ettringite, which may also release aluminium ions which causing further swelling problems, can be avoided in the granular material or any ettringite present therein can be destabilised.