A new initiative aimed at improving public transportation in urban areas has been proposed, highlighting that cities with efficient public transit systems reduce traffic congestion and pollution levels significantly. Proponents argue that enhancing public transport will lead to a decrease in the number of cars on the road, as more people will choose this environmentally friendly option. However, critics contend that rising public transport fares could deter potential users, counteracting these expected benefits. Based on this argument, which of the following, if true, would most effectively strengthen the proposal's conclusion that improving public transportation will result in less traffic congestion?