orys:
I found it and it can be really useful:
truckmapa.wagaciezka.com/On the right you have check box, check the boxes to show:
Drogi krajowe 11,5 tony/oÅ› - National roads with 11,5 tons axleweight permitted.
Drogi krajowe 10 ton/oÅ› - National roads with 10 tons axleweight permitted
Drogi wojewódzkie 10 ton/oś - Departamental with 10 tons axleweight permitted
Drogi krajowe 8 ton/oÅ› - National roads with 8 tons axleweigt permitted
Drogi z ograniczeniami - Roads with local limits
Mosty z ograniczeniami - Bridges with limits.On all other roads max 8 tons axleweight is permitted, unless signposted otherwise.
Do we have something like that for UK?