Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Workers installing new Centralized Traffic Control panel in dispatchers office; A. T. Brumfield, far right. 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. Workers installing new Centralized Traffic Control panel in dispatchers office. 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. Workers installing new Centralized Traffic Control panel in dispatchers office. 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. Worker helping install new Centralized Traffic Control panel in dispatchers office. 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 using NP crane to hoist crate with Centralized Traffic Control equipment to platform roof. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, station, railroad employee, crane

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

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. Worker on platform roof readies new Centralized Traffic Control equipment for movement into dispatchers office. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, railroad employee, station

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

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