This $1.50/gallon price advantage was corroborated by Clean Energy Fuels, one of the major companies that are actively engaged in developing the transportation segment of the U.S. LNG market. Clean Energy Fuels, recently reported that "CNG (was costing) up to $1.50 less per gallon equivalent than diesel fuel.. . (and that this savings) translates to annual fuel cost savings (natural gas vs. diesel) of up to $15,000 per truck (emphasis added)." They also claim that some fleets owners that they supply with CNG are finding that their hourly operating costs have been reduced by "as much as $10 per hour."