With the housing boom in the early decade, the urban sprawl reached the last remaining valleys of the Inland Empire. Since 2000, with Beaumont's proximity to Los Angeles, various Southern California residents have moved to the San Gorgonio Pass region for its low housing cost, causing a 20% jump in the city's population, making it the fastest growing city in the state. This has concerned many local residents who cite increasing student population in schools, rising demand on the water supply, and increasing traffic through the city on Interstate 10 in both directions. A 2008 study by the Public Policy Institute of California noted that Beaumont and its neighboring communities in the nearby San Jacinto Valley have registered the highest population growth throughout Riverside County and that the region was projected to increase by 4.5% a year to 310,000 by 2015.