The European Commission proposal made yesterday to add trailers and semi-trailers to the Eurovignette Directive can only be seen as an industry incentive if Member States are obliged to apply it from the same date as the motor vehicle CO₂ rate variation. Member States with road user charges must transpose the new Eurovignette rules, which were published in 2022, by 25 March 2024. The current scheme allows Member States to base their infrastructure charging rates according to the Euro class of motor vehicles. After March 2024, a rate variation based on CO₂ performance will become mandatory. (....)