Material moving workers are categorized into two groups—operators and laborers. Operators use machinery to move construction materials, earth, petroleum products, and other heavy materials.

Captains, mates, and pilots of water vessels command or supervise the operations of ships and water vessels, both within domestic waterways and on the deep sea.

Truck drivers are a constant presence on the Nation’s highways and interstates. They deliver everything from automobiles to canned food.

Locomotive engineers are among the most experienced and skilled workers on the railroad. They operate large trains carrying cargo and passengers between stations.

Anyone who has been in a large city knows the importance of taxi and limousine services. Taxi drivers and chauffeurs help passengers get to and from their homes, workplaces, and recreational pursuits such as dining, entertainment, and shopping, as well as to and from business-related events.

Air traffic controllers coordinate the movement of air traffic to make certain that planes stay a safe distance apart. Their immediate concern is safety, but controllers also must direct planes efficiently to minimize delays.

Bus drivers provide transportation for millions of people every year, from commuters to school children to vacationers.

Most are airline pilots, copilots, and flight engineers who transport passengers and cargo, but 1 out of 5 pilots is a commercial pilot involved in tasks such as dusting crops, spreading seed for reforestation, testing aircraft, flying passengers and cargo to areas not served by regular airlines, directing firefighting efforts, tracking criminals, monitoring traffic, and rescuing and evacuating injured persons.