Utah Code Title 41. Motor Vehicles § 41-6a-307. Flashing red or yellow signals--Rights and duties of operators--Railroad grade crossings excluded

(a) operator of a vehicle facing an illuminated flashing red stop signal used in a traffic-control signal or with a traffic sign shall stop at a clearly marked stop line, but if none, before entering the crosswalk on the nearest side of the intersection, or if none, then at a point nearest the intersecting roadway where the operator has a view of approaching traffic on the intersecting roadway before entering;

(b) right to proceed is subject to the rules applicable after making a stop at a stop sign; and

(c) operator of a vehicle facing an illuminated flashing yellow caution signal may cautiously proceed through the intersection or cautiously proceed past the signal.