Judging by the pace at which the company continues to land new customers, the plan appears to be working.

Since Clean Energy unveiled its plan earlier this year to add fueling stations to existing Pilot-Flying J truck stops in more than 30 states, the company has picked up no less than a dozen new accounts representing hundreds of trucks.

Here are a few of the recent wins:

Lancaster Foods -- Lancaster, the largest wholesale produce dealer in the Mid-Atlantic, has begun the transition to CNG-powered refrigerated trucks to make deliveries in the Washington D.C. area.

Saddle Creek -- This transportation and fulfillment firm, which delivers freight across the country, has signed a 10-year agreement with Clean Energy to build dedicated fueling stations to support the firm's growing fleet of gas-powered trucks.

Premier Transportation -- Premier delivers consumer products and other goods to department stores and retail chains in big cities. The company has agreed to use Clean Energy as its sole fuel supplier, with each of its trucks expected to use 15,000 gallons of CNG per year.

And this is just a small sample.

More and more of the nation's largest freight delivery firms are willing to at least test-drive CNG powered trucks. Some are making the full transition and converting their entire fleets.

And with fueling stations along the nation's busiest routes -- such as Los Angeles to Las Vegas, Dallas to Houston, and Chicago to Atlanta -- Clean Energy is well-positioned to maintain its dominant lead in the fuel market.

The company already fills up 25,000 vehicles at 300 locations each week -- and I fully expect that number to continue growing.