RTC Transit is the largest outsourced transit operation in the United States, having overtaken the title from the now-defunct Metropolitan Transportation Authority's Long Island Bus service in late 2011. As of 2011, the contract is worth approximately $600 million over seven years. The fixed route system had been operated by Veolia Transport and its predecessors, ATC-Vancom and National Express, since inception. Bus operators, mechanics, and most other contractor employees are represented by Amalgamated Transit Union Local 1637. Paratransit and dial-a-ride services are operated by First Transit.