In rush hour 2% of vehicles create 20% of extra congestion

French union calls for EU to increase public transport funding | EurActiv: "According to the UTP, “In France, 2% of traffic in city centres during rush hour causes 20% of extra congestion. More broadly, cars are responsible for 40% of CO2 emissions released by road traffic, and up to 70% of other pollutants, therefore generating extremely high external costs.”"