Come, now, it doesn't take that long to slap together a sensible light rail system. But FWIW, if you want an over-the-counter solution, you could just levy a prohibitive congestion charge on cars going into the city and equally prohibitive parking fees on cars staying in the city overnight and then increase the bus coverage to compensate (I assume you have a more or less working bus network that can be easily expanded). Flourishes and details such as an exemption for trucks delivering goods (or centralised logistics and delivery system, if that would work better in your city) might be applied as needed. Then migrate from bus to subway and light rail as you go along.

- Jake

Friends come and go. Enemies accumulate.