While the fuel efficiency of new vehicles is clearly an important issue today, it's certainly not the only area where emissions and fuel consumption can be reduced. Carmakers are scrambling to reduce all their energy use to save money. The latest effort from Honda is the new Auto-Max rail car. Honda worked with Greenbrier companies to develop the Auto-Max and has now deployed 400 of them. Honda is shipping 82 percent of its vehicles by rail and the new rail cars can hold up to 22 vehicles compared to 10 for conventional rail cars. The rail cars give Honda more flexibility to pack in more vehicles with a mix of different types, helping the company to cut the fuel use and emissions per vehicle shipped. Honda has also revamped the rail infrastructure at its Ohio factories, allowing them to now ship out more vehicles by rail. The changes provide an annual savings of 2,436 gallons of fuel and 54,432 pounds of CO₂.