The freeway's congestion problems are legendary, leading to jokes that the road was numbered 405 because traffic moves at "four or five" miles per hour, or because drivers had spent "four or five" hours to travel anywhere. It then passes the Getty Center as it ascends the Sepulveda Pass through the Santa Monica Mountains. The freeway continues into Westwood, passing just to the west of UCLA. It serves the Los Angeles neighborhoods of Mar Vista and West Los Angeles while passing a few miles east of Santa Monica, intersecting with I-10 in the process. It then passes through Westchester and Culver City where it meets SR 90, the Marina Freeway. I-405 next passes through Inglewood, coming near SoFi Stadium, home to the Los Angeles Rams and Los Angeles Chargers of the National Football League. It passes to the east of the airport, serving it with exits at Imperial Highway and Century Boulevard. The freeway then encounters I-105 on the southeastern corner of Los Angeles International Airport. I-405 then continues to roughly parallel the contour of the coastline as it passes through the South Bay communities of Torrance, Lawndale, Redondo Beach, Hawthorne, and El Segundo. The freeway then intersects with I-110 as it briefly reenters the city of Los Angeles by passing through the Harbor Gateway, a strip of land connecting San Pedro to the rest of the city. The 405 freeway as seen from a plane landing at LAX airport. It passes near California State University, Dominguez Hills and Dignity Health Sports Park, home of Major League Soccer club LA Galaxy. The freeway then intersects with I-710 before entering Carson (and crossing through a small sliver of the city of Los Angeles before reentering Carson). It passes to the north of California State University, Long Beach and then along the south of Long Beach Airport. I-405 enters Los Angeles County in the city of Long Beach. I-405 then intersects the southern end of I-605 before crossing the San Gabriel River and entering Los Angeles County. It continues along the northern edge of Seal Beach, passing between Naval Weapons Station Seal Beach and Joint Forces Training Base Los Alamitos, before SR 22 splits from I-405 and continues west while the freeway turns north. The freeway then travels through Fountain Valley and along the edges of Westminster and Huntington Beach before entering Seal Beach, where it begins to run concurrently with SR 22. It passes South Coast Plaza before a partial interchange with SR 73, which serves as a partially-tolled bypass of I-405 between Costa Mesa and Laguna Niguel. After passing the airport, the freeway enters Costa Mesa and has an interchange with SR 55. It then continues through Irvine, passing north of UC Irvine and then along the northern boundary of John Wayne International Airport. The freeway passes immediately south of the Irvine Spectrum Center mall before intersecting with State Route 133 (SR 133). I-405 begins at the El Toro Y interchange in southeastern Irvine in Orange County, splitting from its parent I-5 and inheriting that route's San Diego Freeway title I-5 continues north as the Santa Ana Freeway. The Bristol exit near South Coast Plaza and Segerstrom Center for the Arts, with Saddleback in the background It also serves Los Angeles International Airport (LAX), Long Beach Airport (LGB) and Orange County's John Wayne Airport (SNA). It has played a crucial role in the development of dozens of cities and suburbs along its route through Los Angeles and Orange counties. The freeway's annual average daily traffic between exits 21 and 22 in Seal Beach reached 374,000 in 2008, making it the highest count in the nation. I-405, heavily traveled by both commuters and freight haulers along its entire length, is the busiest and most congested freeway in the United States. I-405 is a bypass auxiliary route of I-5, running along the southern and western parts of the Greater Los Angeles urban area from Irvine in the south to near San Fernando in the north. The entire route is known as the northern segment of the San Diego Freeway. Interstate 405 ( I-405) is a major north–south auxiliary Interstate Highway in Southern California.