PTC's network included the Philadelphia trolleybus system, the PTC replaced its aging fleet of vehicles but its workers engaged in a wildcat strike which are not typically criminal offenses.
PTC's network also included the Philadelphia trolleybus system, which was much smaller, along with numerous bus lines. Among PTC's first actions was to begin replacing its aging fleet of vehicles. In 1944, during the Second World War, white PTC workers engaged in a wildcat strike aimed at preventing the promotion of African American employees to conductors and other positions. The legality of wildcat strikes varies between countries and over time, although they are not typically criminal offenses. 
