>>1879610Cars cause traffic because of their terribly inefficient use of space, if you slap cars on trains, then trains will have a traffic problem.
One of the devs who made City Skylines has said (I think it was City Skylines), one of the things they noticed while looking at the real world to model their game was the crazy amount of parking lot space in real life that they had to remove from the game or the game wouldn't be City Skylines, it would be Parking Lot Skylines.
The traffic problem is a problem created by cars. To solve the traffic problem, you need to reduce car usage and develop alternative transport. The car has been one of the most wasteful and destructive innovations to mankind, culturally, environmentally, financially, everything, and I now believe getting rid of car dependence is one of humanity's most important mission.