Utah Code Title 41. Motor Vehicles § 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 two 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.

(5) A violation of this section is an infraction.


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