A survey of fleet vehicle providers has found that biodiesel is now the most popular alternative fuel option on the market, followed by E85. The National Biodiesel Board says the study conducted by the Association for the Work Truck Industry shows that the nation’s top fleets call biodiesel the number one choice for greening fleet operations. The 2018 Fleet Purchasing Outlook study shows that 75 percent of fleet respondents planning to acquire trucks in 2018 anticipate maintaining or increasing use of diesel engine powered trucks, and more fleets are planning to acquire or continue using biodiesel than any other alternative fuel option. Survey organizers note that Nearly 40 percent of respondents indicated they currently operate alternative-fueled trucks in their fleets, up four percent from 2017, and interest is at the highest recorded level since 2014.