Modern Transportation Launches the Era of 12-liter, Natural Gas Powered Trucking: Converts Fleet to Serve Mission Critical Owens

  Modern Transportation Launches the Era of 12-liter, Natural Gas Powered
  Trucking: Converts Fleet to Serve Mission Critical Owens Corning Route

     Alternative fuels-based service for Owens Corning in Savannah, GA is
    Industry’s first-ever to employ 12-Liter LNG tractors. Transportation
   milestone made possible through partnership including Cummins Westport,
                     Freightliner and Clean Energy Fuels.

Business Wire

PITTSBURGH -- April 26, 2013

Modern Transportation, an industry leader in bulk logistics solutions,
announced today the successful deployment of freight service to the Owens
Corning Roofing Plant in Savannah, GA using trucks powered solely by 12-liter
natural gas-fueled engines. The high volume, dedicated service established
between Sanford, NC and Savannah, GA on April 18th, 2013, is the first ever
built around commercial-order, production-built engines (Cummins Westport
ISX12 G) fueled exclusively with liquefied natural gas (LNG).

“We’re absolutely thrilled to operate the first production transportation
service powered by 12-liter natural gas engines,” said Patrick Cozzens,
president of Modern Transportation. “Along with our partners who made this
happen and Owens Corning who ‘drove’ the idea, we’re committed to delivering
high quality logistics solutions in the safest, greenest and most sustainable
fashion. As a participant in the natural gas production industry, we’re also
delighted and honored to utilize America’s own shale gas reserves to power our
fleet.”

This breakthrough in truck fuel technology and power was given strong impetus
by Owens Corning through their strategic focus on transitioning their supply
chain into natural gas-fueled solutions as rapidly as possible. A Fortune 500®
manufacturer and market innovator in glass-fiber technology, Owens Corning
operates one of the nations’ largest supply chain infrastructures. OC’s Chief
Sustainability Officer, Frank O’Brien-Bernini, took note of this milestone:
“As we strive to improve the total life cycle environmental impact of our
products, we have challenged our supply chain/logistics partners to join us in
dramatically reducing the greenhouse gas emissions of our inbound raw
materials and outbound finished products. Modern Transportation has
proactively embraced this challenge, solving problems and presenting viable
conversion opportunities. We applaud their initiative in contributing to our
diesel-to-natural gas conversion strategy.”

Modern Transportation has closely monitored the NG-powered truck sector and
had opted to defer on freight opportunities tied to natural gas powering until
the output from prior generation 9-liter engines was improved upon. Patrick
Cozzens elaborated, “The horsepower required to move the freight loads common
to heavy bulk trucking – particularly for the high volume, mission-critical
manufacturers who demand safe, reliable and responsive service – made the
12-liter motor a necessity. As the NG fuel supply infrastructure matures, we
believe this generation of NG-fueled engines will transform the face of
trucking.”

The power plant making this service possible is the Cummins Westport ISX12 G
installed in Freightliner Cascadia day cabs. Old Dominion Truck Leasing
actively pursed ownership of these first production units and leases them
directly to Modern Transportation. The fleet will fuel at Clean Energy’s
Latta, SC station and will complete each 600-mile roundtrip on a single
fueling.

About Modern Transportation: www.moderntrans.com

A leader in innovative logistics solutions for the bulk materials industry,
Modern serves Fortune 500® manufacturers and the mineral & material producers
who supply them. The company recently celebrated its 25th Anniversary along
with many of its launch customers who have remained in partnership throughout.
Modern serves industries from glass production to roofing, from chemical
manufacturing to natural gas drilling & production – hauling a range of liquid
and dry bulk materials from terminals across the United States.

For details, contact Rich Kushner: 412-489-4778 /
richard.kushner@moderntrans.com

About Cummins Westport: www.cumminswestport.com

Cummins Westport Inc. designs, engineers and markets spark-ignited natural gas
engines for medium- and heavy-duty transportation applications such as trucks
and buses. Cummins Westport is a joint venture of Cummins Inc. (NYSE: CMI), a
corporation of complementary business units that design, manufacture,
distribute and service engines and related technologies, including fuel
systems, controls, air handling, filtration, emission solutions and electrical
power generation systems, and Westport Innovations Inc. (NASDAQ: WPRT / TSX:
WPT), a global leader in alternative fuel, low-emissions technologies that
allow engines to operate on clean-burning fuels such as compressed natural gas
(CNG), liquefied natural gas (LNG), hydrogen and biofuels such as landfill
gas.

For details, contact Nicole Adams: 604-718-2011 / media@westport.com

About Old Dominion Truck Leasing: www.odleasing.com

Old Dominion Truck Leasing has a unique history in the transportation
industry. The company was founded in 1963 by Jack Congdon, and has continued
to grow for 50 years. Over the years, the company’s menu of services has
increased to include full-service leasing, quality rentals, sales and service,
contract and commercial maintenance, used equipment sales, and dedicated
logistics. The company credits its success to its core philosophies of
integrity, flexibility, and creativity

For details, contact Jeff Congdon: 804-275-7832x106 / jwcongdon@odleasing.com

About Freightliner: www.freightlinertrucks.com

Freightliner Trucks is a division of Daimler Trucks North America LLC,
headquartered in Portland, Oregon, and is the leading heavy-duty truck
manufacturer in North America. Daimler Trucks North America produces and
markets Class 4-8 trucks and is a Daimler company, the world's leading
commercial vehicle manufacturer.

For details, contact Dave Giroux: 503-745-6435 / david.giroux@daimler.com

About Clean Energy Fuels: www.cleanenergyfuels.com

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 details, contact Patric Rayburn: 562.936.7583 /
patric.rayburn@cleanenergyfuels.com

Contact:

Modern Transportation
Rich Kushner, 412-489-4778
richard.kushner@moderntrans.com