“Mason Porter, professor of nonlinear and complex systems at the University of Oxford, said: “We know that there is empirical evidence for some cognitive limit – how many digits people can memorise from phone numbers, or how many moving objects.”

Now, he added: “Cities and their transportation networks have grown to the point where they have reached a level of complexity that is beyond human processing capability to navigate around them.”” – Transport maps in big cities baffle human brain, says study