The California Public Utilities Commission (CPUC or PUC) is a regulatory agency that regulates privately owned public utilities in the state of California, including electric power, telecommunications, natural gas and water companies. In addition, the CPUC regulates common carriers, including household goods movers, passenger transportation companies (like limousine services) and rail crossing safety. The CPUCs headquarters are located in the Civic Center district of San Francisco, and the agency has field offices in Los Angeles and Sacramento. On April 1, 1878, the California Office of the Commissioner of Transportation was created. During the 19th century, public concerns over the unbridled power of the Southern Pacific Railroad grew to the point that a three-member Railroad Commission was established, primarily to approve transportation prices. However, the Southern Pacific quickly dominated this commission to its advantage, and public outrage re-ignited. As experience with public regulation grew, other common utilities were brought under the oversight of the Railroad Commission. On March 3, 1879 the California Constitution was adopted by constitutional convention and was ratified by the electorate on May 7, 1879, and included provisions relating to Railroad Commissioners in article XII. On April 15, 1880 the Board of Railroad Commissioners was created. On March 20, 1909 the Railroad Commission of the State of California replaced these other entities. On February 9, 1911 the California Legislature passed the Railroad Commission Act reorganizing the Railroad Commission.