Oregon Revised Statutes Oregon Vehicle Code § 811.400

(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:

(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.