Want to contribute? CITIES SKYLINES TOP 10 MODS CITIES SKYLINES TOP 10 MODS. Cargo Hold Fix: Increases the efficiency of filling cargo trains, ships and planes, using as much of their capacity as possible. Ambient Sounds Tuner: Changes some of the in-game ambient sounds. Prop Snapping: Lets you snap props to buildings and elevated roads. Traffic Manager: President Edition by LinuxFan. Not really looking for a single 'best', but rather I'm curious about the interaction between all the top traffic mods out there. This list is intended as an overview of most of the best mods available.