I've been thinking about the possibility of building a model of a local Intermodal yard. I found the Google satellite view a while back and today was using it to measure the actual size of yard. The yard itself is about 3,000 feet long while the entire yard, including it's approach sidings, is about 1.12 miles. At 1:87 scale that still 34 feet of yard and a total of 67 feet with the sidings. Yikes! Obviously, there's no practical way to build that at scale so some compression is obviously necessary. But what amount of compression is "normal" when you're trying to model things like that?