Currently three-quarters of Sun Tran’s fleet exclusively utilizes biodiesel fuel, which is a domestically produced, renewable fuel that can be manufactured from vegetable oils, animal fats or recycled restaurant greases.

Today, the maturation of alternative fuels has made it easier for transit agencies to implement programs than it was for early adopters in the 1990s. Even still, there are many lessons to learn from the early pioneers, including being aware of possible infrastructure and training investments.