I had the opportunity to visit the Dallas Area Train Show this weekend. It had a good number of vendors and layouts. I have uploaded the two best layouts of the show. The first is the Spring Creek Model Railroad Club and the second is the Texas Outlaws On30 Group. Both of these were the best as far as interesting to look at, but of course this is just my opinion.
First off, here is the Spring Creek Club's modular layout.
Last but not least, here is the Texas Outlaw On30 Modular Layout.