We could very well be on the precipice of a change in the railroad industry not seen in 60 years. It is becoming very expensive to fuel locomotives with diesel, and liquefied natural gas engines could be a solution. Investors in Westport Innovations (WPRT 1.06%) should be excited about this, because it has a jump-start in this market with the recent delivery of four LNG locomotive engines to Canadian National Railway (CNI 0.39%). At $1 million per engine and fueling tender, this is a potential $30 billion market. 

How much of this market is actually attainable? And how much can Westport capture when major industrial manufacturers like General Electric (GE -3.19%) are looking for a foothold in this space as well? Find out some possible answers to these questions by tuning into the video below.