The **interurban road** is where most fatal accidents occur. This is due to several factors:

- **Roads outside cities**: Most fatal accidents happen on roads that are outside towns or cities, that is, on interurban roads. These roads usually have less control and surveillance than urban ones.

- **Fewer accidents on highways and expressways**: Although highways and expressways are also interurban roads, they have fewer accidents compared to other interurban roads. This is because they are designed to be safer, with separated lanes and fewer intersections.

- **Conditions of interurban roads**: Interurban roads can have more dangerous conditions, such as sharp curves, elevation changes, and less lighting, which increases the risk of serious accidents.

For these reasons, it is on **interurban roads** where more accidents with fatal consequences are recorded.