As you approach the tool booths on the French motorways, standard road etiquette collapses into road race anarchy. Cars scoot across the tarmac looking for the shortest queue. Once through the barrier, there’s a thrilling burst of acceleration over unmarked road. Maybe to help contain this freeform driving, there are some giant red plastic balls, patched with reflective panels. They seem to a hybrid bred from a traffic cone and a beach ball. Gendarmes kick the balls into place to direct traffic. Certainly the coolest temporary road signage on the tarmac this season.