To ensure safety in the event of a flat tire while driving, it is essential **to carry the necessary tools for changing wheels**. This is because, if your vehicle has a spare wheel and does not have an alternative system for changing wheels, you will need these tools to be able to perform the change effectively.

- **Changing a flat tire**: If a tire goes flat, you must replace it with the spare. For this, it is essential to have the appropriate tools that allow you to make the change safely and efficiently.

- **Spare wheel**: Although some vehicles may have temporary use spare wheels, known as "space-saver wheels," which only allow you to reach the nearest workshop, it is crucial to have the tools to be able to install it.

- **Preparation for the trip**: Before starting a trip, it is important to check that you carry a spare wheel and the necessary tools for its installation. This is part of the safety checks you must perform to be prepared for any eventuality on the road.

In summary, carrying the necessary tools for changing wheels is crucial to be able to use the spare wheel in the event of a flat tire and thus ensure your safety and that of others on the road.