Signal others to coordinate vehicle movement.

Signal others to coordinate vehicle movement. is a detailed work activity in O*NET — a concrete unit of work shared across 11 occupations and seen in 16 occupation-specific tasks. It rolls up into the broader work activity Signal others to coordinate work activities. in Coordinating the Work and Activities of Others .

Detailed work activities are the most granular shared layer in O*NET's work-activity hierarchy (Generalized → Intermediate → Detailed → occupation-specific task). The figures below describe how this activity shows up across the economy and what independent studies measure about AI and this kind of work — not a prediction that the work will be automated.

AI exposure

Of the 16 tasks under this activity that the OpenAI / Eloundou “GPTs are GPTs” study rated, 0 (0%) are flagged as directly exposed to language models (E1) or exposed via model-powered tools (E2).

Exposure estimates overlap with model capabilities — whether a model could speed the task up — not whether the work will be done by software. Observed AI use is augmentation and assistance today, not jobs replaced.

Member tasks

Occupation-specific tasks O*NET maps to this detailed work activity, most important first.

• Signal locomotive engineers to start or stop trains when coupling or uncoupling cars, using hand signals, lanterns, or radio communication. · Railroad Brake, Signal, and Switch Operators and Locomotive Firers · importance 4.8 · no direct exposure
• Call out train signals to assistants to verify meanings. · Locomotive Engineers · importance 4.8 · no direct exposure
• Signal engineers to begin train runs, stop trains, or change speed, using telecommunications equipment or hand signals. · Railroad Conductors and Yardmasters · importance 4.7 · no direct exposure
• Observe signals from other crew members so that work activities can be coordinated. · Railroad Brake, Signal, and Switch Operators and Locomotive Firers · importance 4.7 · no direct exposure
• Signal crew members for movement of engines or trains, using lanterns, hand signals, radios, or telephones. · Rail Yard Engineers, Dinkey Operators, and Hostlers · importance 4.5 · no direct exposure
• Tow and maneuver barges or signal tugboats to tow barges to destinations. · Captains, Mates, and Pilots of Water Vessels · importance 4.5 · no direct exposure
• Observe hand signals, grade stakes, or other markings when operating machines so that work can be performed to specifications. · Excavating and Loading Machine and Dragline Operators, Surface Mining · importance 4.4 · no direct exposure
• Signal passing vessels, using whistles, flashing lights, flags, or radios. · Captains, Mates, and Pilots of Water Vessels · importance 4.4 · no direct exposure
• Observe hand signals, grade stakes, or other markings when operating machines. · Loading and Moving Machine Operators, Underground Mining · importance 4.3 · no direct exposure
• Signal other workers to set brakes and to throw track switches when switching cars from trains to way stations. · Railroad Brake, Signal, and Switch Operators and Locomotive Firers · importance 4.3 · no direct exposure
• Set flares, flags, lanterns, or torpedoes in front and at rear of trains during emergency stops to warn oncoming trains. · Railroad Brake, Signal, and Switch Operators and Locomotive Firers · importance 4.1 · no direct exposure
• Signal workers to move loaded cars. · Loading and Moving Machine Operators, Underground Mining · importance 4.0 · no direct exposure
• Relay specified signals to other ships, using visual signaling devices, such as blinker lights or semaphores. · Sailors and Marine Oilers · importance 3.9 · no direct exposure
• Signal transportation operators to stop or to proceed. · Passenger Attendants · importance 3.9 · no direct exposure
• Direct truck drivers backing vehicles into loading bays and cover, uncover, or secure loads for delivery. · Crane and Tower Operators · importance 3.6 · no direct exposure
• Guide aircraft to designated areas using hand signals, batons, or other methods. · Aircraft Service Attendants · no direct exposure

Occupations that perform this

• Railroad Brake, Signal, and Switch Operators and Locomotive Firers
• Locomotive Engineers
• Railroad Conductors and Yardmasters
• Rail Yard Engineers, Dinkey Operators, and Hostlers
• Captains, Mates, and Pilots of Water Vessels
• Excavating and Loading Machine and Dragline Operators, Surface Mining
• Loading and Moving Machine Operators, Underground Mining
• Sailors and Marine Oilers
• Passenger Attendants
• Crane and Tower Operators
• Aircraft Service Attendants

Sources for this page

Every figure above traces to a named public dataset and the exact release below — not hand-written opinion. See the full methodology for what each measure does and does not mean.

• O*NET 30.3 U.S. Department of Labor / National Center for O*NET Development
• “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130 OpenAI / academic

Data compiled June 2, 2026. Figures are estimates, not advice.

@misc{singulariki-signal-others-to-coordinate-vehicle-movement,
  title  = {Signal others to coordinate vehicle movement.},
  author = {{Singulariki}},
  year   = {2026},
  note   = {O*NET 30.3; “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130. Accessed June 7, 2026},
  url    = {https://singulariki.com/detailed-activities/signal-others-to-coordinate-vehicle-movement}
}