On a motorway, it is important to know how to act in case of a **breakdown or emergency**. If your vehicle cannot maintain the **minimum speed of 60 km/h** due to a breakdown, and this **obstructs traffic**, you must drive on the **right shoulder**. This is to avoid disturbing other road users and to allow traffic to flow normally.

- **Emergencies on motorways**: If your vehicle has a breakdown and cannot reach the necessary speed, you must exit the motorway at the first available exit. However, if you cannot exit immediately, you can use the right shoulder to drive until you find an exit.

- **Safety**: If the vehicle cannot continue driving, you must park it on the right shoulder or in a place where it causes the least possible obstruction. It is crucial to turn on the hazard lights and, if possible, place the warning triangle to alert other drivers.

- **Traffic regulations**: Vehicles driving on the shoulder must do so in a line, one behind the other, to maintain order and safety on the road.

In summary, driving on the shoulder on a motorway is allowed only in emergency or breakdown situations, when the vehicle cannot maintain the minimum speed and is causing an obstruction to traffic.