Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Outside of station, workers hoist crate with Centralized Traffic Control equipment to platform roof. Photo by J.M. Fredrickson. Other Subject Classes: signal equipment, railroad employee, station

Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Outside of station, workers hoist crate with Centralized Traffic Control equipment to platform roof. Photo by J.M. Fredrickson. Other Subject Classes: signal equipment, railroad employee, station

Northern Pacific signal equipment at Union Station, Tacoma, Washington, on December 11, 1967. New Centralized Traffic Control panel ready for movement into dispatchers office. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment

Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Outside of station, workers hoist crate with Centralized Traffic Control equipment to platform roof. Photo by J.M. Fredrickson. Other Subject Classes: signal equipment, railroad employee, station

Northern Pacific employees, Union Station, Tacoma, Washington, December 11, 1967. Workers move new Centralized Traffic Control panel through window into dispatchers office. Photo by J.M. Fredrickson . Other Subject Classes: railroad employee, signal equipment

Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Workers on platform roof opening crate containing new Centralized Traffic Control equipment. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, station, railroad employee

Northern Pacific employees, Union Station, Tacoma, Washington, December 11, 1967. Workers on platform roof ready new Centralized Traffic Control equipment for movement into dispatchers office. Photo by J.M. Fredrickson. Other Subject Classes: railroad employee, signal equipment

Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Railroad employees installing new Centralized Traffic Control panel in dispatchers office; from left Jim R. Gibson, C. G. Stillman, A. T. Brumfield, unknown. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, railroad employee, dispatchers office

Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Outside of station with workers hoisting crate with Centralized Traffic Control equipment to platform roof. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, station, railroad employee

Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Outside of station with workers hoisting crate with Centralized Traffic Control equipment to platform roof. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, station, railroad employee