More than 14 million jobs—about 11 percent of civilian jobs in the United States—are infrastructure-related. This workforce pipeline includes a multitude of transportation professions from bus and truck drivers, to autoworkers and engineers, in both motorized and non-motorized modes. Due to industry growth, transportation also has the potential to be a major U.S. job creator. Millions of workers will need to be hired to fill vacancies created by occupational transfers, retirements and other exits. Certain transportation sectors are already facing critical workforce shortfalls. For example, 54.5 percent of people in the current workforce within the six largest transportation sectors are 45 years or older, 8.7 percent higher than the national average.