Valley Metro is set to replace up to 24 vehicles in its old fleet with new CNG buses, which are environmentally friendly ...

Pueblo Transit secures $15.7m US federal grant and $3.9m CDOT funding to replace diesel buses with hybrids, modernizing fleet and cutting emissions.

This new planned ship for the Cape May-Lewes Ferry fleet is expected to reduce output of carbon dioxide and other pollutants.

After months of work, setbacks and late-night fixes, the diesel-swapped truck finally moves under its own power for the first time. This episode covers the small-but-annoying problems that stack up ...

The initiative positions Quincy as an early adopter of emissions-reduction technology that could offer environmental and ...