2006 Utah Code - 41-6a-804 — Turning or changing lanes -- Safety -- Signals -- Stopping or sudden decrease in speed -- Signal flashing -- Where prohibited.

     41-6a-804.   Turning or changing lanes -- Safety -- Signals -- Stopping or sudden decrease in speed -- Signal flashing -- Where prohibited.
     (1) (a) A person may not turn a vehicle or move right or left on a roadway or change lanes until:
     (i) the movement can be made with reasonable safety; and
     (ii) an appropriate signal has been given as provided under this section.
     (b) A signal of intention to turn right or left or to change lanes shall be given continuously for at least the last three seconds preceding the beginning of the movement.
     (2) A person may not stop or suddenly decrease the speed of a vehicle without first giving an appropriate signal to the operator of any vehicle immediately to the rear when there is opportunity to give a signal.
     (3) (a) A stop or turn signal when required shall be given either by the hand and arm or by signal lamps.
     (b) If hand and arm signals are used, a person operating a vehicle shall give the required hand and arm signals from the left side of the vehicle as follows:
     (i) Left turn: hand and arm extended horizontally;
     (ii) Right turn: hand and arm extended upward; and
     (iii) Stop or decrease speed: hand and arm extended downward.
     (c) (i) A person operating a bicycle or device propelled by human power may give the required hand and arm signals for a right turn by extending the right hand and arm horizontally to the right.
     (ii) This Subsection (3)(c) is an exception to the provision of Subsection (3)(b)(ii).
     (4) A person required to make a signal under this section may not flash a signal:
     (a) on one side only on a disabled vehicle;
     (b) as a courtesy or "do pass" to operators of other vehicles approaching from the rear; or
     (c) on one side only of a parked vehicle.

Renumbered and Amended by Chapter 2, 2005 General Session