Plugging in to Cut Petroleum Use

#16 Clean Cities Top 20 Facts Clean Cities has helped put 20,000 PEVs on the road Clean Cities has made a significant contribution toward the electrification of transportation, having helped deploy more than 20,000 plug-in electric vehicles (PEVs...

UPS to Expand Use of Liquefied Natural Gas

UPS, a founding member of Clean Cities' National Clean Fleets Partnership, announced plans to invest approximately $50 million to build an additional nine liquefied natural gas (LNG) fueling stations, bringing the total number of stations to 13. Four ...

Industry Partners are Critical to the Mission

Photo of a Cummins Westport ISX12 G engine


Clean Cities Top 20 Facts

Cummins Westport and American Honda lead the way in developing alternative fuel vehicles

Almost 18,000 stakeholders contribute to Clean Cities' goals and accomplishments by participating in nearly 100 Clean Cities coalitions across the country. Private companies, fuel suppliers, local governments, vehicle manufacturers, national laboratories, state and federal government agencies, and other organizations partner under Clean Cities to implement alternative-transportation solutions in local communities.

As part of Clean Cities' 20th anniversary this year, DOE recognized two long-time industry partners for their notable contributions to widespread deployment of alternative fuel vehicles (AFVs).

Cummins Westport: Longest continuously available heavy-duty dedicated AFV product line

Cummins Westport designs, engineers, and markets 6- to 12-liter spark-ignited natural gas engines for commercial transportation applications. Today, more than 34,000 Cummins Westport engines are in service worldwide. This includes the new 2013 ISX12 G 11.9-liter engine, a natural gas option for on-highway trucks—the largest automotive heavy-duty truck market in North America.

"Cummins Westport remained committed to develop robust products and make them continuously available to customers, even in the face of changing market conditions," said National Clean Cities Director Dennis Smith. "It worked hard to refine the technology and bring customers to the table, often in partnership with DOE, the national labs, Clean Cities coalitions, and vehicle manufacturers."

Photo of the 2013 Civic Natural Gas

American Honda: Longest continuously available light-duty dedicated AFV product line

Honda first released the Civic Natural Gas in 1998. The vehicle was originally marketed primarily to fleet customers nationwide, and it is now available to fleets and retail consumers from select dealers across the country.

Over the years, Honda representatives have participated in hundreds of local and national Clean Cities events, providing education, information, and technical expertise as well as "loaner/demo" Civics.

"Honda has remained committed to this technology and to the vision of a transportation future in which natural gas plays a larger role," said Smith. "The company and its dealers have worked closely with Clean Cities coalitions to help fleets successfully incorporate these vehicles into their operations to cut petroleum use."

Fleets considering engine options like the Cummins Westport offerings or light-duty vehicle options like the Civic Natural Gas should consult the Alternative Fuels Data Center's (AFDC) Heavy-Duty Vehicle and Engine Search and Light-Duty Vehicle Search.

Clean Cities 20th Anniversary Logo

blog post written by

  • National Renewable Energy Laboratory

  • For more information:
  • Clean Cities Technical Response Service Team
  • 800-254-6735

States Enact Natural Gas Vehicle and Infrastructure Incentives

During the first part of 2013, several states enacted legislation pertaining to natural gas vehicles (NGVs) and natural gas infrastructure development. In recent years, as deployment of natural gas fueling infrastructure has increased and natural gas ...

Label Your Used Car’s Fuel Economy

Users can download the label as a graphic to embed in an advertisement or display on a vehicle. #14 Clean Cities Top 20 Facts helps consumers and businesses share used cars' fuel economy In 1999, the U.S. Department of Energy an...

Spotlight on Biodiesel

#13 Clean Cities Top 20 Facts Nearly 60 million gallons of petroleum displaced in 2012 Clean Cities coalitions have played an important role in the growing use of biodiesel as a transportation fuel. Recent coalition reports show that stakeholders...

Find Your Next Truck Now

#12 Clean Cities Top 20 Facts Heavy-duty guide and search make it easy to explore alternative fuel options Clean Cities offers a robust collection of tools and publications designed to inform decision makers and help stakeholders deploy alternati...

Electric Drive Vehicle and Infrastructure Key Terms

What are the key terms to know when discussing electric drive vehicles and their fueling infrastructure? It is important to know how to "talk the talk" when it comes to electric drive vehicles. Becoming familiar with the terms below will help you bett...

Coalitions: The Backbone of Clean Cities

Photo of Melissa Howell


Clean Cities Top 20 Facts

Clean Cities' longest-tenured coordinator has served for nearly two decades

Since the first six Clean Cities coalitions received official U.S. Department of Energy designation in 1993, these organizations have been making an impact in their communities every day. The Clean Cities model for local decision making works because of coalitions' unique mix of businesses, fuel providers, vehicle fleets, state and local government agencies, and community organizations. Their activities stimulate local economies, facilitate the adoption of new transportation technologies, and make their communities less dependent on petroleum. Today, there are nearly 100 coalitions representing about 75% of the U.S. population.

Within each coalition, a Clean Cities coordinator works to connect the puzzle pieces, identify projects, find and leverage funding, and help stakeholders implement projects in the community.

Meet Melissa Howell of the Kentucky Clean Cities Partnership (KCCP). Howell has led the Kentucky coalition since 1994 and is Clean Cities' longest-tenured coordinator. Over the years, she has worked with hundreds of fleets and other transportation decision makers to implement strategies to cut petroleum use and vehicle emissions.

As one example, Howell worked closely with Mammoth Cave National Park over several years, helping it become the first national park in the country to operate all its vehicles on alternative fuels. See the video case study.

Thanks also to Howell's leadership, thousands of students across Kentucky ride to school on some 156 hybrid electric buses. The buses are fitted with data loggers that help determine which routes make the best use of the hybrid technology, and some are achieving double the fuel economy of their diesel counterparts. Read the case study.

Howell has been a very active mentor, especially to new coordinators in other coalitions. She's often called upon to share her experience and knowledge to reinvigorate stalled projects, overcome technical barriers, and instill confidence in rising leaders. These qualities have earned her great accolades over the years, including Clean Cities Coordinator of the Year (2008) and her induction into the Hall of Fame (2011). Most recently, she was named Alternative Transportation Pioneer at the Clean Cities 20th anniversary event. Read more about Howell and her coalition's accomplishments in a Q&A post on the blog.

Clean Cities 20th Anniversary Logo

blog post written by

  • National Renewable Energy Laboratory

  • For more information:
  • Clean Cities Technical Response Service Team
  • 800-254-6735

Reducing Vehicle Idling

#10 Clean Cities Top 20 Facts An idling vehicle gets 0 mpg Idle reduction has been one of Clean Cities' key strategies for cutting petroleum use since 2004. Reducing vehicle idling has immense potential for serious emissions benefits and cost sav...