Below the Cherkov-building are two squares, the right one is LCPD Broker.
When Niko and Roman drive past it you can see these buildings:
And from the trailer you can see the Broker bridge on the left.
I think all this came from Jordan's frame-by-frame report.
Oh and here's the pic from the t3:
So all the glory goes to him.
BUT! As we can see from the scene where they are driving past the LCPC Broker, we are under a ElTrain track.
This is the same track seen in trailer2 when the windshield is shot (/me thinks so). And is also the place to see that there are
cloned textures since all the bases of the pillars are exactly the same.
Also the pic with the nucelar power sign and "hove beach" sign are right next to Broker bridge.