Investors interested in Transportation stocks should always be looking to find the best-performing companies in the group. Is Westinghouse Air Brake Technologies (WAB) one of those stocks right now? Let's take a closer look at the stock's year-to-date performance to find out.Westinghouse Air Brake Technologies is a member of our Transportation group, which includes 135 different companies and currently sits at #8 in the Zacks Sector Rank. The Zacks Sector Rank considers 16 different sector groups. The avera ...