In his quest to make Paris greener, the city’s new Socialist mayor, Bertrand Delanoe, wants to add more than 25 miles of bus lanes and discourage more cars from coming into the city. “Today, private motorists, who make up a quarter of road users, use up 94 percent of Paris’s road surfaces. I have a duty, Paris has asked me, to rebalance this equation,” said Delanoe on Friday, as he rode in a bus away from town hall.