I am using my own models for even the small details, like the radio towers, traffic, and road textures. Please check out my models:
https://3dwarehouse.sketchup.com/use...55495697621172
Update sometime soon, hopefully, if there isn't an update for a long period of time, i most likely i am working on one of my other 10GB of 3d models. I made a 3d model of Xbox ONE, scratch. (Most downloaded Xbox One on the 3DWH, even has internal detail, like my cars)
UPDATE SOON, and i have 600+ models, nearly 100 of which are cities.