Designed to give cost-effective emissions reductions as quickly as possible, the Clean Fuel Bus Program is an initiative of the local government in an explicit attempt to set an example of environmental standards. It takes a mostly technological approach, aiming to replace or retrofit the existing diesel bus fleet with cleaner technologies. The initiative goes voluntarily beyond mandatory emission control standards. To achieve these goals Compressed Natural Gas (CNG) buses are used as well as hybrid buses, and clean diesel technologies.
Goals of the program include reducing bus fleet emissions to levels below current U.S. mandates, as well as reducing the cost of operations by improving fuel economy and avoiding many infrastructure costs. General service improvements in terms of equipment reliability and quieter operation were some others.