Goals and Accomplishments

Clean Cities Coalitions 2022 Activity Report

Clean Cities and Communities coalitions employ five strategies to advance affordable, efficient, and clean transportation fuels and technologies:

Evaluate transportation needs and energy choices to determine the most impactful and cost-effective vehicle options, fuels, technologies, and best practices that make sense for specific stakeholder applications
Shift to efficient and clean energy sources through the use of alternative and renewable fuels such as natural gas, propane, hydrogen, electricity, ethanol, and biodiesel
Improve fuel efficiency through state-of-the-art technologies and strategies
Reduce greenhouse gas emissions through idle reduction and other fuel-saving technologies and practices
Demonstrate and evaluate new mobility choices that maximize the return on investment for mobility systems in terms of time, cost, energy, and opportunity.

In 2023, Clean Cities and Communities celebrated 30 years of boosting the country's energy security, economic vitality, and quality of life by advancing affordable, efficient, and clean transportation fuels and technologies.

Impacts of Alternative Fuels and Advanced Vehicle Technologies

Since 1993, Clean Cities and Communities coalitions have steadily increased their energy use impact each year through diverse transportation projects for a cumulative impact equal to nearly 14 billion gasoline gallon equivalents (GGEs). Coalitions have helped to place nearly 1.6 million alternative fuel vehicles on the road and establish the fueling infrastructure to serve this growing market. They have also aided in the elimination of millions of hours of vehicle idling and have been instrumental in the entry of new transportation technologies into the marketplace.

Cumulative Energy Use Impact

The cumulative energy use impact of Clean Cities coalitions has reached nearly 14 billion GGEs since 1993 through alternative fuel use, fuel economy improvements, idle-reduction measures, and other strategies. Source: Clean Cities coalitions annual activity reports

Energy use impact is a metric that measures the quantity of conventional fuel that was shifted to clean, domestic, economical sources, such as alternative fuels, or saved through efficiency improvements. The metric used is gasoline gallon equivalents.

Cumulative Energy Use Impact
Year	Annual	Cumulative
2022	1065600000	13900000000
2021	955700000	12809000000
2020	955000000	11853000000
2019	1063000000	10898000000
2018	1056000000	9835000000
2017	973000000	8779000000
2016	978000000	7806000000
2015	897000000	6828000000
2014	800000000	5930000000
2013	742000000	5131000000
2012	661000000	4389000000
2011	641000000	3728000000
2010	520000000	3087000000
2009	482000000	2567000000
2008	287000000	2085000000
2007	294000000	1798000000
2006	302000000	1504000000
2005	187000000	1202000000
2004	233000000	1015000000
2003	156000000	782000000
2002	133000000	626000000
2001	119000000	494000000
2000	92000000	375000000
1999	87000000	283000000
1998	67000000	196000000
1997	43000000	128000000
1996	45000000	86000000
1995	26000000	41000000
1994	15000000	15000000

Energy Use Impact by Technology Type

In 2022 alone, coalition projects resulted in a cumulative impact in energy use equal to 873 million gasoline gallon equivalents by using alternative fuel vehicles. Source: Clean Cities Coalitions 2022 Activity Report

* EVs include all-electric vehicles and plug-in hybrid electric vehicles, but not hybrid electric vehicles.

Energy Use Impact by Technology Type
Technology Type	Million GGEs
Natural Gas	458.24
Ethanol	89.71
Biodiesel	84.01
EVs*	71.59
HEVs	56.61
Off-Road	52.93
Idle Reduction	50.48
Propane	47.05
Fuel Economy	39.66
Renewable Diesel	35.20
VMT Reduction	31.92
Renewable Natural Gas	30.12
Hydrogen	0.46

Clean Cities Alternative Fuel Vehicle Inventory

Coalitions have made great strides to integrate alternative fuel vehicles (AFVs) across the United States. In 2022, nearly 1.6 million of the AFVs in operation were a result of Clean Cities coalition efforts. Source: Clean Cities Coalitions 2022 Activity Report

* Electric includes all-electric vehicles and plug-in hybrid electric vehicles, but not hybrid electric vehicles.

Clean Cities Alternative Fuel Vehicle Inventory
Fuel	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022
Biodiesel	31922	52275	91584	98785	17222	2814	88726	99347	103106	98028	130540	189823	160763	150695	153380	163366	203839	163116	155978
Compressed Natural Gas	76257	49271	57458	55021	51121	44317	42911	48157	59521	79616	68479	107283	98388	97271	82266	100938	87392	93153	123463
Ethanol (E85)	47643	72899	221834	385671	524169	642520	403981	479706	197187	259337	275508	271996	457817	327865	263967	275216	268047	516313	568837
Hybrid Electric	10674	18553	43886	81987	101954	107585	30613	50503	141406	83339	82834	94330	129827	178011	178733	144875	157540	177900	154089
Hydrogen	23	42	72	86	75	74	62	118	50	46	49	95	97	116	402	691	413	371	276
Liquefied Natural Gas	0	1873	2271	1731	2053	2038	3410	4315	3411	3645	2992	3974	4924	5070	5100	4917	4510	3969	2860
Electric*	9241	7464	9481	5895	14135	4568	9223	10541	20455	32187	65042	96896	171011	162811	227854	263543	234277	314936	475330
Propane	31338	21117	25543	23628	22260	7937	13196	18793	16501	35554	17404	22762	23648	34753	25395	31985	30156	31982	33716
Renewable Diesel	0	0	0	0	0	0	0	0	0	0	0	3183	71066	7819	11174	13109	11807	19089	27377
Renewable Natural Gas	0	0	0	0	0	0	0	0	0	0	313	366	1157	1734	1677	4922	7229	11043	11002

U.S. Alternative Fueling Station Inventory

Today's drivers can find thousands of fueling stations across the country that provide natural gas, electricity, ethanol, and other alternative fuels. Source: Alternative Fuels Data Center

U.S. Alternative Fueling Station Inventory
Fuel Type	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022
Biodiesel	0	0	0	0	0	0	0	0	2	16	79	142	176	304	459	805	633	660	615	633	690	832	783	713	716	704	680	611	712	730	1193
Compressed Natural Gas	349	497	1042	1065	1419	1426	1268	1267	1217	1232	1166	1035	917	787	732	731	771	803	869	941	1155	1290	1495	1607	1730	1682	1621	1576	1549	1510	1399
Electric	0	0	0	188	194	310	486	490	558	693	873	830	671	588	465	432	440	484	626	2100	6200	8100	10712	13696	17723	19792	22826	26959	31738	50054	53492
Ethanol (E85)	2	7	32	37	68	71	40	49	113	154	149	188	200	436	762	1325	1699	1982	2296	2494	2519	2616	2840	3012	3095	3379	3627	3786	3946	4331	4426
Hydrogen	0	0	0	0	0	0	0	0	0	0	7	7	9	14	17	33	51	63	58	56	58	53	51	35	58	63	62	64	63	67	72
Liquefied Natural Gas	0	0	0	0	72	71	66	46	44	44	36	62	58	40	37	35	38	37	43	43	61	84	103	117	140	137	129	118	106	103	98
Methanol (M85)	43	50	82	88	95	106	91	51	3	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Propane	3297	3297	3299	3299	4252	4255	5318	4153	3268	3403	3431	3966	3689	2995	2619	2331	2110	2420	2604	2551	2644	2967	2931	3749	3654	3510	3319	3176	2956	2805	2713

In the past 30 years, the U.S. Department of Energy (DOE) has funded hundreds of transportation projects nationwide through a competitive application process. Clean Cities and Communities coalitions have historically leveraged these federal dollars to produce 2:1 in additional matching funds and in-kind contributions from private and public sector partners.

National Award Recipients

DOE recognizes the accomplishments of Clean Cities and Communities coalitions and stakeholders through the Hall of Fame.