1980 motorway and trunk routes taken from the ordinance survey 1:625,000 digital records, drawn using software by the author on an Archimedes computer.
The most striking feature of the network is the lack of roads covering the London population. In Northern Britain the main routes look like mountain passes, scaling their way through the cities. It can be seen that roads are most concentrated, per capita, in more rural areas. The cartogram is based on night-time population, so if it were redrawn using daytime figures all the cities would be very much larger. London, in particular, would appear to be very much more poorly served with roads.