I agree that spending money on railways is effevetive to address the urban road system too crowd.For example,people live in countyside who need car to commute to work usually drive by themself,if railway is more convient,they well take it more.Also,the railways are spent more money,the system well get better,it is helpful that decrease people's dependence on their cars.As a result,it is effective that reduce volume of traffic on the road.