Use non-power tools (shovels, picks, axes, sledgehammers); high precision measuring tools (micrometers, voltmeters, amp meters, recorders); hand tools (screwdrivers, wrenches, pliers, tape measurers); power tools (drills, wrenches, power saws). The position of the Crewman is responsible for the physical labor and the assistance in installing, inspecting, testing, and maintaining train control systems and grade crossing warning device equipment at railroad signal projects with direction from Signal Foreman.