Pittsburgh Railways was one of the predecessors of Pittsburgh Regional Transit. It had 666 PCC cars, the third largest fleet in North America (after Toronto (745) and Chicago (683)). It had 68 streetcar routes, of which only three (until April 5, 2010, the 42 series, the 47 series, and 52) are used by the Port Authority as light rail routes. With the Port Authority's Transit Development Plan, many route names will be changed to its original, such as the 41D Brookline becoming the 39 Brookline. Many of the streetcar routes have been remembered in the route names of many Port Authority buses (e.g. 71 series). History 1895 to 1905 was a time of consolidation for the numerous street railways serving Pittsburgh. On July 24, 1895 the Consolidated Traction Company (CTC) was chartered and the following year acquired the Central Traction Company, Citizens Traction Company, Duquesne Traction Company and Pittsburgh Traction Company and converted them to electric operation. On July 27, 1896 the United Traction Company (UTC) was chartered and absorbed the Second Avenue Traction Company, which had been running electric cars since 1890. The Southern Traction Company (STC) acquired the lease of the West End Traction Company on October 1, 1900. Pittsburgh Railway Company (PRC) was formed on January 1, 1902, when STC acquired operating rights over CTC and UTC. The new company operated 1,100 trolleys on of track, with 178.7 million passengers and revenues of $6.7 million on the year. PRC had over 20 car barns in the city as well as power stations. 1918 was the company's peak year, operating 99 trolley routes over of track. The lease and operate business model proved hard to support and the company declared bankruptcy twice, first in 1918 lasting for 6 years and then again in 1938, this time lasting until January 1, 1951. Company costs rose in the early twentieth century. PRC faced constant pressure from the city to improve equipment and services. Workers walked out when a pay raise was rejected. On July 26, 1936, PRC took delivery of PCC streetcar No. 100 from the St. Louis Car Company. It was placed in revenue service in August 1936, the first revenue earning PCC in the world. Large scale abandonments of lines began in the late 1950s, usually associated with highway or bridge work. Duquesne-McKeesport Highway improvements in the Duquesne-McKeesport area resulted in the replacement of trolley services with buses