Warning: proportions of buildings and exact locations may differ. Map gives only a relative overview where to search for the signs.

You spawn headed to the wall. Turn left until you see this view.

Proceed driving in the middle through the buildings.

After 100 sign turn to left and drive to the middle of the map between the 2 hedges

Get back and drive North around the last building before the wall. If you are right you can see the tribunes in the background.