Thanks. I shot it without any vehicles, then with a car going by. When I saw the truck coming I knew I wanted it in there. (He was moving pretty quick, so I was happy with the shutter timing). But the original had either the truck too dark, or I would loose the deep green of the building. Thank goodness for Viveza software to be able to burn in the truck without loosing the other colors. I posted the set showing the process on the photo site where I put up my practice stuff (full resolution). If interested you can see it here:
http://trainyard.smugmug.com/Daily-Shots/2011-05-20-Daily/17180712_fgvMmW

First, my eye sees the interesting building and the subtle colors - then a closer look brings in the large truck. It's enjoyable to have photos that require some attention. Well done.