Driving on **motorways and dual carriageways** is safer for several reasons:

- **Road design:** Motorways and dual carriageways are designed to facilitate safer and smoother driving. They have separate lanes for each direction of traffic, which reduces the risk of head-on collisions. Additionally, they usually have fewer sharp curves and changes in gradient, which decreases the likelihood of accidents.

- **Fewer obstacles:** On these roads, it is less common to encounter obstacles such as intersections, traffic lights, or pedestrian crossings, which are frequent on urban roads and through roads. This allows for maintaining a constant speed and reduces the need for sudden braking.

- **Traffic regulations:** On motorways and dual carriageways, vehicles must drive on the right and leave the left lane free for overtaking, which better organizes the flow of traffic and minimizes the risk of accidents.

- **Fewer interferences:** As there are no level crossings or intersections, many of the risk situations present on other types of roads, such as through roads or intersections, are eliminated.

In summary, motorways and dual carriageways offer a more controlled and predictable environment for driving, which contributes to greater road safety.