Self-interested drivers opting for the quickest route do not take into account their effect of lengthening others「 journey times, and so can gum up a new shortcut.
As credit lines gum up and outsiders plead for action, it is not just the euro that is at risk, but the future of the European Union and the health of the world economy.
Aggressive drivers, who don」t give the car in front of them enough space, and timid drivers, who need a big gap between themselves and the cars surrounding them, gum up the works for everybody else.