Dow Jones Transportation Average. An index of 20 corporations in the transportation sector, including air, rail, and truck.

Dow Jones Transportation Average. Average of the prices of 20 representative transportation companies. See: Dow Jones Composite; Dow Jones Industrial Average; Dow Jones Utility Average

DOW JONES TRANSPORTATION AVERAGE. The oldest U.S. stock index, it measures the performance of 20 companies, from railroads to overnight delivery services, that move things from one place to another.