Build light rail in existing cities, build parking lots for people who need to drive to a light rail station, and start charging a toll for people who drive in

Build light rail in existing cities, build parking lots for people who need to drive to a light rail station, and start charging a toll for people who drive in places where light rail could take them. Slowly but surely you can turn a city built around cars into a city built around public transit. This is possible in small and large cities and would reduce congestion, pollution, and the danger to pedestrians and cyclists.