Heavy Duty Trucking is looking for fleets that have made a commitment to sustainability, alternative fuels and lowering greenhouse gas emissions for its 2014 Top 50 Green Fleets.

HDT's editors are asking fleets to fill out a short survey online, with basic information about their fleet, alternative fuel use and SmartWay participation, plus room to offer additional comments on "green" projects.

Special attention will be paid to initiatives from the past year.

The top green fleets will be featured in the November issue of HDT and on Truckinginfo.com. View last year's list here.

These fleets also will receive an invitation to attend the Green Fleet Conference in Schaumburg, Ill., Oct. 29-30 at a discounted rate. Honorees who attend will be recognized during a general session, and select honorees will be invited to participate in a panel discussion at the event.

All sizes and types of fleets are encouraged to enter. Fill out the survey here.