Abstract: An assembly, preferably comprising a clearance pole, includes a first pole element with a first horizontal portion and a second vertical portion, and a second tubular pole element mounted to the ground, extending vertically, and receiving the first pole second portion. The first and second pole elements are mounted so that the first element is rotatable with respect to the second about a vertical axis. The slanted surface of an ultra-high molecular weight polyethylene block acts as a cam follower engaging a rod, bar, or tube which acts as a cam, the structures biasing the first pole element first portion to a home position. A dry lubricant is provided between the pole element bearing surfaces to provide relatively friction-free rotation between them.