Version 1.1.641 fixed several mission-related bugs in the UDI mode, where players could drive vehicles on their custom roads. Prior patches had desynchronization between the on-screen vehicle position and the underlying traffic simulation. Update 1.1.641 introduced:
Right-click the game in Steam (or modify your desktop shortcut target) and add these command-line arguments: simcity 4 1.1.641
: This forces the legacy engine to render natively in modern widescreen formats up to 4K. Version 1