On motorways, one of the main problems drivers face is the **decrease in attention due to monotony**. This occurs because motorways are often straight and with fewer variations in the landscape, which can lead the driver to relax too much and lose concentration.

- **Road-related distractions**: Driving on a well-known motorway can lead to overconfidence, which increases the risk of distraction. Additionally, the lack of varied visual stimuli can cause the driver to not pay enough attention to signs or other vehicles.

- **Human risk factors**: Distractions are one of the main causes of accidents, and on motorways, monotony can be a significant distraction. Lack of attention can be as dangerous as speeding or alcohol consumption.

Therefore, it is crucial that drivers remain alert and aware of their surroundings, even on road sections that seem less demanding.