You have mounted twin tyres on your truck tractor. What must you remember?

Your response correctly identified both of the necessary points regarding the mounted twin tyres on a truck tractor.

Firstly, the requirement for additional lights if the tyres extend more than 40 cm laterally is crucial for visibility and safety during nighttime driving. This regulation ensures that other road users are aware of the vehicle’s extended width, which helps in preventing accidents.

Secondly, marking excessive width with warning plates is essential when the truck exceeds a width of 2.75 m. This marking informs other drivers about the broader dimensions of the vehicle, contributing to safe navigation on the road, particularly in tight spaces.

The third option you did not select, stating that the width must not exceed 2.55 m, is also relevant because it sets a legal limit for vehicle width in general. However, in the context of twin tyres, the emphasis is on compliance with width regulations and visibility rather than solely maintaining that specific limit.

Thus, the combination of options 1 and 2 is necessary because they address safety and compliance for vehicles that exceed standard dimensions. Understanding these regulations is critical for all drivers, especially those operating larger vehicles, to ensure safety and legality on the roads.