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

You answered correctly. When you install twin tyres on your truck tractor, you must ensure that the width of the vehicle does not cause safety issues. If the tyres extend more than 40 cm laterally beyond the vehicle’s lights, you must add extra lights on the outside for visibility, especially in darkness. Additionally, if the truck becomes wider than 2.75 meters due to the twin tyres, you need to mark this excessive width with warning plates, so other road users are aware of the larger dimensions. However, the legal maximum permitted width for regular operation is 2.55 meters, and option 3 is incorrect because exceeding 2.55 meters is only allowed with special markings. Your selections show an accurate understanding of these safety requirements. Knowing these rules helps ensure your truck remains legal and safe when using twin tyres.