network of electric streetcars and cable cars by the end of the decade, which spurred the development of new streetcar suburbs across modern-day Seattle. Interurban railways to Everett, Tacoma, and the Rainier Valley were established after the turn of the century, giving the region an intercity passenger rail system to feed the streetcar lines. The interurban system failed to compete with the increasing popularity of automobile travel, capped by the completion of U.S. Route 99 in the late 1920s, and was shut down. By 1941, the streetcars had also been acquired by the municipal government and replaced with a trolleybus network. Various proposals for a rapid transit system in Seattle, to replace the streetcar—and later bus—networks, were presented in the 20th century and rejected by city officials or voters due to their cost or other factors. In 1911, urban planner Virgil Bogue proposed a system of subway tunnels and elevated railways as the centerpiece to a comprehensive plan for the city, which was rejected by voters. The Seattle Center Monorail, originally built for the 1962 World's Fair, has been the subject of several unsuccessful expansion proposals backed by Governor Albert Rosellini in the 1960s and Seattle voters in the early 2000s. The Forward Thrust Committee of the late 1960s proposed a rapid transit system, to connect Downtown Seattle to Ballard, the University District, Lake City, Capitol Hill, Bellevue, and Renton. The federal government offered to fund two-thirds of the rail system's capital costs, approximately $770 million (equivalent to $ in dollars), if $385 million (equivalent to $ in dollars) in local property taxes were approved by voters. The rapid transit initiative was placed on the ballot in February 1968, but fell short of supermajority needed to pass. A second attempt in May 1970, with $440 million (equivalent to $ in dollars) in local funding and $870 million (equivalent to $ in dollars) in federal funding, failed amid a local economic downturn caused by layoffs at Boeing. The federal funding earmarked towards the rapid transit system was granted to Atlanta, Georgia, forming the initial funding for the Metropolitan Atlanta Rapid Transit Authority's rail system. Light rail planning Following the failed Forward Thrust initiatives, Metro Transit was created in 1972 to oversee a countywide bus network, and plan for a future rail system. In the early 1980s, Metro Transit and the Puget Sound Council of Governments (PSCOG) explored light rail and busway