In 1930, the high point for railroad transportation in Oklahoma, there were 6,678 mi (10,747 km) of railroad track in the state. In 2000, there were 3,903 rail mi (6,281 km) of track; Burlington Northern and Santa Fe had the most track, followed by Union Pacific. Kansas City Southern was the other Class I railroad operating in the state in 2000. In 1979, Amtrak terminated the state's last passenger train. Inter-urban transit needs, formerly served by streetcars (one of the most popular routes operated between Oklahoma City and Norman), are now supplied by buses.
The Department of Transportation is responsible for construction and maintenance of the state road system, which in 2000 included state roads and highways, and interstate highways. The main east-west highways are I-44, connecting Tulsa and Oklahoma City, and I-40; the major north-south route is I-35, which links Oklahoma City with Topeka, Kansas and Dallas–Ft. Worth, Texas. Overall in 2000, Oklahoma had 112,634 mi (181,266 km) of roadway. A total of 3,072,137 motor vehicles were registered in 2000, including 1,587,115 automobiles and 1,410,783 trucks. There were 2,295,036 licensed drivers.
The opening of the McClellan–Kerr Arkansas River Navigation System in 1971 linked Oklahoma with the Mississippi River and thus to Gulf coast ports. Tulsa, Port of Catoosa, is the chief port on the system, handling 1.9 million tons of cargo in 2000.
Oklahoma had 339 airports, 92 heliports, 1 stolport, and 1 seaplane base in 2002. Will Rogers World Airport in Oklahoma City and Tulsa International Airport are the state's largest airports.