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Clean Energy Releases Fourth Edition of ROAD TO NATURAL GAS

  Clean Energy Releases Fourth Edition of ROAD TO NATURAL GAS

                    Expands to Rail with GE Transportation

Business Wire

SEAL BEACH, Calif. -- June 17, 2013

Clean Energy Fuels Corp. (Nasdaq:CLNE) today released Vol. IV of ROAD TO
NATURAL GAS, an update of its growing portfolio of customers making the switch
to natural gas as a transportation fuel or expanding their current fleets.
This edition includes new agreements recently signed including Clean Energy’s
first railroad fuel deal with GE Transportation to provide liquefied natural
gas (LNG) for its new initiative to test LNG locomotives.

“Considerable strides have recently been made to propel America further and
faster down the road to natural gas. The recent announcement by UPS to
significantly expand their LNG fleet is a noteworthy signal by an
industry-leader that natural gas will play a big role in the future of
trucking. Clean Energy will support the UPS expansion by opening multiple new
stations on our America’s Natural Gas Highway,” said Andrew J. Littlefair,
Clean Energy’s president and CEO. “The other notable development is the rail
industry’s acknowledgement that LNG will play a role in its future. Clean
Energy’s fuel deal with GE Transportation expands our relationship with a
company that is highly committed to the development of a market for a
cleaner-burning, domestic fuel.”

The fourth edition of ROAD TO NATURAL GAS (attached below) contains a listing
of natural gas fuel agreements signed since the third edition was released on
February 25, 2013. Key industry developments are also noted, such as UPS’
recent announcement that it will expand its LNG fleet with 700 additional
tractors and build four LNG stations by the end of 2014. America’s Natural Gas
Highway® stands ready to fuel this industry transition as momentum continues
to build in the long-haul trucking segment.

Natural gas fuel costs up to $1.50 less per gallon than gasoline or diesel,
depending on local market conditions. The use of natural gas fuel not only
reduces operating costs for vehicles, but also reduces greenhouse gas
emissions up to 30% in light-duty vehicles and 23% in medium to heavy-duty
vehicles.

About Clean EnergyFuels Corp.

Clean Energy Fuels Corp. (Nasdaq: CLNE) is the largest provider of natural gas
fuel for transportation in North America. We build and operate compressed
natural gas (CNG) and liquefied natural gas (LNG) fueling stations;
manufacture CNG and LNG equipment and technologies for ourselves and other
companies; convert taxis, vans, pick-up trucks and shuttle buses to natural
gas; and develop renewable natural gas (RNG) production facilities. For more
information, visitwww.cleanenergyfuels.com.

Forward-Looking Statements — This news release contains forward-looking
statements within the meaning of Section 27A of the Securities Act of 1933 and
Section 21E of the Securities Exchange Act of 1934 that involve risks,
uncertainties and assumptions, including statements about the deployment of
natural gas vehicles, the amount of natural gas fuel expected to be consumed
by new and existing customers, the number and location of stations to be
included in America's Natural Gas Highway, the timing for the completion of
construction of these stations, the benefits of natural gas relative to diesel
fuel, and expectations about the future adoption of natural gas as a vehicle
fuel. Actual results and the timing of events could differ materially from
those anticipated in these forward-looking statements as a result of several
factors, including, but not limited to, the performance, availability and
benefits of natural gas trucks relative to gasoline and diesel trucks, the
number of natural gas trucks deployed by our customers, permitting or other
delays encountered during the identification of locations for, and the
construction of, natural gas fueling stations, including those stations
planned for America's Natural Gas Highway, and the price per gallon of natural
gas fuel relative to diesel and gasoline. The forward-looking statements made
herein speak only as of the date of this press release and, unless otherwise
required by law, the Company undertakes no obligation to publicly update such
forward-looking statements to reflect subsequent events or circumstances.
Additionally, the reports and other documents the Company files with the SEC
(available at www.sec.gov) contain risk factors, which may cause actual
results to differ materially from the forward-looking statements contained in
this news release.

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Contact:

Clean Energy Investor Contact:
Tony Kritzer
Director, Investor Relations
562-936-7120
tkritzer@cleanenergyfuels.com
or
Clean Energy Fuels Media Contact:
Patric Rayburn
Public Relations Manager
562-936-7583
patric.rayburn@cleanenergyfuels.com