1.lorry drivers should not be driving at faster than 60 anyway.
2.Everyone on this thread has at sometime passed their test, and had to use a motorway for the first time how many people on this thread had an accident on the first couple of occasions they used the motorway?very few,probably none,it has not been necessary for the last 50 years and is not necessary now.
3 Bernard you are generalising from one particular experience.