PARIS (Reuters) - Thousands gathered on motorways across France on Saturday to protest against higher fuel taxes and President Emmanuel Macron’s economic policies, in a campaign of road blockades in which one protester was accidentally killed and dozens were injured. Dubbed the “yellow vests”, protesters took to motorway sliproads and tunnel entrances, causing major back-ups at some highway tolls and blocking access to airports, including in Toulouse. The demonstrations, coordinated on social media, and born out of a backlash against rising fuel prices, are the latest confrontation between Macron and dissatisfied voters who view the former investment banker as out...