Thanks James! I was actually in my car parked down to the right as I was waitng for shots. This train backed into the yard and stopped to couple more cars further down. It then occured to me that the overpass would be a great vantage point, so I ran my ass off getting up there (the guys in the yard must think I'm nuts!). I ripped off about 15 shots using the railing as my tripod, it then started moving again. Thanks to auto-bracketing I got some good shots. The morning was looking like a bust until the last minute!