Resource List: Transportation
- Most Popular International Car Colors, 2003–2004
- Most Expensive Cars, 2007
- Transportation Technology & Milestones
- Least and Most Polluting Cars, 2013
- Least and Most Polluting Cars, 2011
- Least and Most Polluting Cars, 2010
- Least and Most Polluting Cars, 2009
- Top-Selling Vehicles in the U.S., 2006
- Most Popular International Car Colors, 2005–2006
- Speed Records: Cars, Trains, Bikes, Boats, and More
- The U.S. Highway System
- Ten Famous Trains
- Two Centuries of Railroading
