What should be noted when loading vehicles?

The selected combination is correct as it follows the relevant German traffic regulations regarding vehicle loading.

1. Loads that project beyond the retro-reflectors by more than 1 meter must be labeled to ensure visibility and safety for other road users. This labeling helps to prevent accidents, particularly at night or in low-visibility conditions.

2. Loads exceeding 2.50 meters in height may not project forward by more than 50 cm to maintain safe driving conditions and visibility for the driver. This regulation is crucial to avoid obstructing the view and ensuring that the load does not interfere with the vehicle's operation or surrounding traffic.

The incorrect option states that it is not necessary to secure heavy loads, which contradicts safety regulations. Securing loads is vital to prevent them from shifting during transit, which can cause accidents. Therefore, it is essential to recognize and apply all relevant rules when loading vehicles to promote safety on the road.