A controlled motion hinge assembly having a base with a first actuator mount, a pivot arm with a second actuator mount, a hinge pivotally connecting the base to the pivot arm to be movable between an extended position and a retracted position, and an actuator shaft. The shaft has a first end, a second end, and a threaded body extending between the first and second ends. The first end is configured to receive a drive torque about the actuator shaft axis. The second end is rotatably connected to the second actuator mount, but fixed thereto along the actuator shaft axis. The threaded body engages a threaded bore of the first actuator mount such that rotation of the body causes the first actuator mount to move along the actuator shaft axis. Also provided is a pole assembly, and a method for retrofitting a pole, with a controlled motion hinge.