ORS 811.400: Failure to use appropriate signal for turn, lane change, stop or exit from roundabout; penalty.

(1) A person commits the offense of failure to use an appropriate signal for a turn, lane change or stop or for an exit from a roundabout if the person does not make the appropriate signal under ORS 811.395 by use of signal lamps or hand signals and the person is operating a vehicle that is:

      (a) Turning, changing lanes, stopping or suddenly decelerating; or

      (b) Exiting from any position within a roundabout.

      (2) This section does not authorize the use of only hand signals to signal a turn, change of lane, stop or deceleration when the use of signal lights is required under ORS 811.405.

      (3) The offense described in this section, failure to use appropriate signal for a turn, lane change or stop or for an exit from a roundabout, is a Class B traffic violation.