You have to wait because a rail-crossing barrier is lowered. How can you now help protect the environment at this point?

The selected combination is correct because using the automatic start-stop system helps save fuel and reduce emissions while waiting at a rail-crossing barrier. This system automatically shuts off the engine when the vehicle is stationary and restarts it when needed, minimizing environmental impact.

Additionally, putting the vehicle in first gear can prevent it from rolling and ensure that the driver is ready to move as soon as it is safe. Activating the parking brake is also a good practice, as it secures the vehicle in place, especially if the wait is prolonged.

In accordance with German traffic regulations, particularly those that promote safe and environmentally friendly driving, utilizing these systems not only aids in protecting the environment but also promotes safety at traffic stops. Therefore, a combination of all these actions is recommended to be fully environmentally responsible while waiting at a crossing.