it was renamed to Pittway Corporation. Later, Pittway became best known as a manufacturer and distributor of professional fire and burglar alarms and other security systems. On February 3, 2000, Pittway was acquired by Honeywell. Rolling stock Early types Double deck cars were used by PRC between 1913 and 1924, a rarity for such cars in the U.S. Conventional single-deck stock formed the majority of the fleet. PCC types PRC operated 666 PCCs on 68 routes; the second-largest fleet of new cars (after Chicago), starting with number 100, the first PCC to enter revenue service. The company took delivery of car 1600 in 1945, which was the prototype for the over 1,800 post-War “all-electric” PCCs built in North America. Cars 1700–1724, which were delivered in 1948, were equipped with special features for use on the interurban lines to Washington and Charleroi. These included B-3 trucks and a roof-mounted sealed-beam headlight. (Cars 1615–19 and 1644–48 were similarly modified in 1948.) In 1950 the 100 was converted to instruction car M-11. Because replacement parts were no longer available, cars 1784 (originally 1603, and subsequently renumbered 1976) and 1779 were rebuilt in 1976 and 1977 respectively, with LRV-style flat fronts. In 1981 PATransit constructed cars 4000–4013 on new frames that utilized a mix of new parts and components salvaged from retired 1700-series cars. The last four PCCs were finally retired on September 4, 1999, having been replaced by Siemens SD-400 Light Rail Vehicles. Preservation A number of Pittsburgh streetcars have been preserved. Routes Pittsburgh Railways operated 68 streetcar routes. A notable, unnumbered, tripper (unscheduled extra) service was signed Stadium-Forbes Field, for Pitt Panthers and Pittsburgh Steelers football games and Pirates baseball games. Pitt Stadium and Forbes Field were convenient to the lines on Fifth Avenue and Forbes Avenue, both two-way streets during the trolley era. This service, which probably last ran in fall 1966, was no longer possible after the East End lines closed in January 1967. The Interurban lines did not use route numbers. Outbound interurban cars were signed for their outbound destination, namely Charleroi, Roscoe or Washington; some PCC rollsigns instead prefixed Shannon- to the destination, e.g. Shannon-Washington. Inbound cars were signed simply Pittsburgh. Car barns Pittsburgh Railways inherited many different car barns from the companies that formed it, many of which were closed during the final years prior to take over by the Port Authority. At the time of the