Westinghouse Air Brake Technologies (WAB), better known as Wabtec, is an interesting prospect for investors interested in the transportation industry. As a provider of locomotives, transit vehicles, and related products and services, the company is integral to the rail and other niche transportation markets. Though earnings have remained in a fairly narrow range in recent years, the firm has seen significant growth, with sales soaring from $3.31 billion in 2015 to $8.20 billion last year, largely as a result of acquisitions like GE Transportation from General Electric (GE) and Faiveley Transport. By