For the last couple of months, I have been working on a new gameplay mode. I was trying to solve the problem I have with large cities. When you start to play, there are so many traffic problems at the start. It is hard for the player to solve them all at once.
So I have tried to address this issue. I want to introduce all the traffic gradually. Players will have to adapt to the ever-increasing car count on the road and at the same time keep efficiency over a certain threshold.
I took some inspiration from the game Mini Motorways, where you begin with an almost empty map and it becomes more crowded over time.