So the DoT is considering a trial of superlorries of 60 tonnes and two linked containers.
Reasons are lower costs and lower emmissions.
Lower direct costs for the hauliers, I suppose - less labour.
Considering a 38-tonnne truck does 10,000 times more damage than a 1-tonne car, I do not see HGVs now paying their way.
If the aim of the scheme is to lower emissions by linking two containers together, that gives me an idea...
How about linking a whole string together so one driver could pull a multitude? How about making them run on special roads thatcan take such weights? Make the road and the wheels low friction but still able to take the weight and provide sufficient traction? How about making the roads dedicated and direct, so no risk of collisions from private vehicles or delays due to traffic etc.? If we use special computer management, we could even do without the driver when on the dedicated route, as computer control could keep each string of containers separate from each other. In case of failure, the part-time driver could know if the way ahead is clear by using a form of traffic lights as a fall-back system. That would be even more energy efficient.
I know what, lets call it a "railway"?