The Docks
It was a slow day for some reason - all those trucks are usually flying around moving the containers from the ships to the yard. Then the containers are placed onto rail cars or other trucks for transport offsite (these trucks never leave the yard - they just move the containers around).
Interesting note: Each container has a transponder, and can be tracked in real time as it moves from place to place around the yard. The highest object in this photo is one of the antennae.