Road System
They invented a new system which consists of 3 lanes (one going into the city, one for out and one that is a combination of both with bus lines. This way, pedestrians are safe and buses can go at normal speed as they avoid the heavy traffics. This also makes people use buses more since 2 million passengers per day are using it which is a huge increase from before. Buses arrive every 60 sec and are always full. This helps the economic sustainability as the people that go on bus pay for the building of the bus system. Since more people are getting the bus and as they are always full, it's also helping the environmental sustainability as there is less pollution (one bus is less pollution than fifteen cars for example).
