The city has progressed for a few hours tonight, the simulation speed seems to have stabilized, it's back to a stable 0.2. The post office, honestly, doesn't really work, I still have to try replacing the post offices around, but the processed mail is continuously decreasing, even if I put new post offices nothing happens and it keeps dropping.The cargo traffic has improved, but I am modifying some roads to resolve it, it SHOULD be manageable, maybe... i don't know, there are still a loooot of cargos that all wants to go in one lane. However, I still see problems, the ship has shipped for a while but now it's almost at zero, also the planes never ship almost anything. Freight trains, on the other hand, are all at 100%, no matter how many trains I put, the goods percentage remains fixed at 100%.
I reached the 2 bilions max money in one night, with taxes at 3% and parking, water fees, electricity fees and all transports, all FREE
The industry seems to works better now, i got tons more jobs needed around, and people wants to come in city more.