Gas taxes should pay for road improvement. Diesel is very heavily taxed and is the main reason it is priced higher than gasoline. The energy to create diesel is lower than that to create gasoline. The Germans really put a high tax on gas. Last time I heard it cost over $5 a gallon. Diesel cars dominate the market in Europe and the U.S. Is finally catching on. I drove the Autobahn from 1986 to 1989 and loved not looking over my shoulder for police, but when they have an accident it is a monster. It is common to have over 100 car pile ups. And then the traffic just stops for hours and many, many miles. I sat on the hood of my car on the way to Kiasarslautern (sp) for 8 hours.