Archmodels vol. 131 includes 3 sets of 3d city parts with very diverse models of modern metropolies from different regions of the world. Every set consists of a couple of parts that can be used to quickly set up a big city.
Archmodels vol. 131 includes also a simple traffic animation.

IMPORTANT: Xref objects are used in this collection. You can learn how it works in these two tutorials:
Visualization within one hour using archmodels
Heavy scenes management

Homepage:  http://www.evermotion.org/modelshop/show_product/archmodels-vol-131/10352/0/0/