Tachograph

Okay kiddo, a tachograph is a special type of device that is used in big trucks and buses to keep track of how long the driver has been driving. It helps ensure that the driver is not driving for too long without taking a break, which can be dangerous for everyone on the road.

The tachograph works by recording things like the vehicle's speed, the distance it travels, and how long it has been on the road. The driver needs to insert a special card into the device that keeps track of their personal information, like their name and how many hours they are allowed to drive.

At the end of the trip, the driver can take out their card and give it to their boss, who can then use the information to make sure that the driver followed all the rules about taking breaks and not driving for too long. This helps keep everyone safe on the roads and helps the boss make sure their drivers are being responsible.

So basically, a tachograph is like a special watch for big trucks and buses that helps make sure the driver is being safe and following the rules.