Polling stations opened in Paris on Sunday for a referendum on tripling parking costs for hefty SUV-style cars, a campaign that has drivers' groups up in arms against city hall.
Some 1.3 million Parisians are eligible to cast their ballot on the change, which would see cars weighing 1.6 tonnes or more charged 18 euros ($19.50) per hour for parking in central areas, or 12 euros further out.
