By NGT News.

UPS has a goal of driving 1 billion miles in its alternative fuel and advanced technology fleet by the end of 2017, and if the company's annual Sustainability Report and a slew of recent announcements are any indication, UPS has picked up the pace and is well on its way toward meeting that target.

According to its new 2014 Sustainability Report, the company accelerated investment in its clean fleet last year, increasing the number of greener vehicles by 61% over 2013 and adding 1,100 natural gas vehicles. By year’s end, the report says, UPS was operating over 5,000 alt-fuel and advanced technology vehicles on the road worldwide. Such vehicles include all-electric, hybrid electric, hydraulic hybrid, compressed natural gas (CNG), liquefied natural gas (LNG), propane and biomethane models.