U.S. Route 66, or Route 66 (US66) for short, was a historic freeway (U.S. Highway) in the United States that began in Chicago and ended at the Pacific Beach in Santa Monica near Los Angeles. The total length was 3940 km. US66 passes through Illinois, Missouri, Kansas, Oklahoma, Texas, New Mexico, Arizona, and California. The road is also called the Will Rogers Highway. US66 was officially disbanded in 1985 after the Interstate Highway System took over long-distance traffic. Many tourists still follow the old route of Route 66, which now runs from Chicago via the US55 to St. Louis. From there, the road turns into US44 up to Oklahoma City, from where US40 (referred to as I-40) follows most of the original route, up to Barstow. From there one can follow the last stretch over the US15 to drive via San Bernardino to Santa Monica.