Last updated 2-5-2015
B numbers existed until around 1985. These were used for second class motorways. They were usually close to the A road with the same number, but A and B numbers did not form an integrated system. There were also similar C, F, G and H numbers.
There are some single carriageway motorways and there used to be even a road with level corssings with an A number (the A660).
Current numbers are marked in red.
Obsolete numbers see also Wikisara
Marcel Monterie