Matheson helps the Post Office keep its promise of working through snow, rain, heat, and dead of night. The company, a major United States Postal Service contractor, hauls mail for the nation's mail carrier. Its Postal Services unit provides long-haul and local trucking services while its Mail Transportation unit serves Northern California. The company's Matheson Fast Freight unit offers overnight and second day less-than-truckload (LTL) freight transportation in the West and Midwest. (LTL carriers combine freight from multiple shippers into a single truckload.) Matheson Flight Extenders provide terminal handling and ground support services. Robert B. "Brownie" Matheson founded Matheson Trucking in 1962.

The Southeastern Pennsylvania Transportation Authority, known as SEPTA, provides passenger transportation services in the Philadelphia area. The agency's operations include buses, subways and elevated trains, trackless trolleys, and light rail and commuter rail lines. All together, SEPTA maintains more than 300 stations and bus terminals, chiefly in five Pennsylvania counties (Bucks, Chester, Delaware, Montgomery, and Philadelphia) and in the neighboring states of Delaware and New Jersey. Its territory spans some 2,200 sq. mi. The Pennsylvania legislature established SEPTA in 1964, and over the years the agency has acquired the assets of several for-profit transportation companies that operated in the region.

Federal employees and tourists who might otherwise have to bring their cars into downtown Washington, DC, can thank the Washington Metropolitan Transportation Authority for saving them stress and shoeleather. The Metro provides rail and bus transportation services throughout the nation's capital and in its Maryland and Virginia suburbs, a 1,500-sq.-mi. area -- the second largest rail transit system and sixth largest bus network in the US. Overall, passengers take about 350 million rail and bus trips on the Metro annually. The agency's rail system includes about 85 stations served by more than 105 miles of track, both underground and aboveground. Metro operates a fleet of more than 1,500 buses.

Central Refrigerated Service stays cool when it's on the move.Central Refrigerated Service carrier provides temperature-controlled transportation and dry cargo services for major food suppliers and retailers across the US. It specializes in providing a wide array of transportation requests, from inner city and solo driver deliveries to long haul truckload transportation services. Central Refrigerated Service operates a fleet of about 1,800 tractors and 2,700 refrigerated trailers, or reefers.Central Refrigerated Service company is owned by Jerry Moyes, who also owns less-than-truckload carrier Central Freight Lines and truckload carrier Swift Transportation.

Old Dominion Freight Line still makes its stand in Dixie, but the trucking company serves the rest of the US, as well. It transports general commodities in less-than-truckload (LTL) shipments, in which freight from multiple shippers is consolidated into a single truckload. Old Dominion operates a fleet of some 5,000 tractors and more than 20,000 trailers from around 200 service centers. Founded in 1934, Old Dominion directly serves the 48 contiguous states of continental US and offers service elsewhere in North America, Central America, South America, and Asia. The founding Congdon family controls Old Dominion.

Leveraging a fleet of more than 600 tractors and 1,900 trailers, USF Glen Moore provides truckload transportation of freight throughout the US. The company offers national service as well as regional freight hauling; its regional fleets are based in the Midwest, Northeast, Southeast, and West. Its primary bases are in Carlisle, Pennsylvania, and Knoxville, Tennessee. Along with standard for-hire hauling, USF Glen Moore's offerings include teams of drivers (for faster service) and dedicated fleet services, in which drivers and equipment are assigned to a customer long-term. Founded in 1986, the company operates as the sole truckload business within YRC Truckload, a business segment of YRC Worldwide.

The unit was established in 1982. COSCO Americas, Inc. (CAI) represents the interests of its parent, marine transportation giant China Ocean Shipping (Group) Company, known as COSCO, in North and South America. In addition to serving as a shipping agent, CAI provides services related to sales, fuel supply, and technical consulting, as well as inland transportation of freight -- in other words, whatever is necessary to facilitate the movement of containerized and bulk cargo by the parent company. Overall, CAI operates from about 80 offices in Argentina, Brazil, Canada, Chile, Panama, Peru, Uruguay, and the US.

Tsakos Energy Navigation Limited, together with its subsidiaries, provides seaborne crude oil, petroleum products, and liquefied natural gas (LNG) transportation services internationally. Tsakos Energy Navigation Limited company offers marine transportation services for national and independent oil companies and refiners under long, medium, and short-term charters. As of March 31, 2010, it operated a fleet of 46 double-hull tankers, including 3 VLCC tankers, 9 suezmax tankers, 12 aframax tankers, 7 panamax tankers, 6 handymax tankers, 8 handysize tankers, and 1 LNG carrier. Tsakos Energy Navigation Limited company was formerly known as MIF Limited and changed its name to Tsakos Energy Navigation Limited in July 2001. Tsakos Energy Navigation Limited was founded in 1993 and is based in Athens, Greece.

Trucking company Penn Tank Lines specializes in transporting petroleum and petroleum products, including asphalt. The company operates from a network of more than 25 terminals in the eastern half of the US, spanning several states from New Hampshire to Florida. President and CEO Jack McSherry founded Penn Tank Lines in 1974. The company was combined with the petroleum division of Fleet Transport in 1995.

Traffic lights smooth the flow of vehicles through intersections, and Traffic Management smoothes the flow of freight worldwide. Catering mainly to the Minnesota region, the company provides a wide range of domestic and international transportation management and freight forwarding services, including the coordination of freight movement by truck, train, ship, and plane. Company president Dawn Montez founded Traffic Management in 1997.

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