This tutorial on 3ds Max will explain how to create quickly a city in 3ds Max.

It needs the greeble plugin available here http://max.klanky.com/plugins.htm.

1. Create a plane with 20 segments width and height

create plane

 

2. You'll obtain this result on top view 

Plane to view

 

3. Transform your plane in edit poly

Convert to edit poly 

 

4. Select these polygons that will be the roads

select roads

 

5. Detach these polygons

Detach polygons

 

6. Name the object "Roads"

Name it roads

 

7. Apply the greeble modifier to the first plane with these parameters

greeble

 

8. You must obtain this magical result

Greeble result

 

9. Select these set of materials in the greeble plugin parameters

Greeble materials 

10. Than apply a Multi/Sub Object materials to your city to obtain this

Final