A final decision on introducing mega trucks has not yet been made on a European level even though they were rejected last year by the European Transport Commissioner, Antonio Tajani. This comes from the Environmental Transport Association (ETA). See their website which includes a video.
These ‘mega trucks’ would be massively longer and heavier than what is currently permitted. 60-tons as against 40 tons, 25 metres long as against 18.25 metres.
40 tons, 18.25 metres is the current maximum permitted for a lorry in Britain. (And in Ireland too I presume.)
In comparison, a Boeing 737-300 carrying its maximum 127 passengers weighs 57.6 tons at take-off, making it lighter than a mega-truck, says the ETA, which is part of a pan-European coalition of organisations against the widespread introduction of these trucks.