The latest move in Anne Hidalgo’s war on cars has left Paris motorists teetering on the edge of despair. Last week, the city’s left-wing mayor reduced the speed limit on the Périphérique, Paris’s critical eight-lane motorway, to a crawl-inducing 30 mph. For the thousands of suburban commuters who rely on it, it’s made the daily grind unbearable, cementing Hidalgo’s disdain for anyone daring to drive in the capital.