How to find alternative fuel refill stations as you travel

Many fuels have been proposed as alternatives to gasoline. Most face the early adopter with same problem -- where to refuel while on the road? A tool to address this chicken and egg dilemma has been created by the National Renewable Energy Laboratories, an Internet atlas showing the location of hydrogen, compressed natural gas, and other fuels.

The Google-map based map tracks sources for liquefied natural gas, propane, hydrogen, electric, compressed natural gas, E85, and biodiesel.

Looking at the results, I was immediately struck by the ease with which a vehicle running on compressed natural gas could cross the country on I-94 through the northern tier, where stations are evenly dispersed along the route.