Utah Code § 41-6a-601

Speed regulations -- Safe and appropriate speeds at certain locations -- Prima
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facie speed limits -- Emergency power of the governor.
(1) A person may not operate a vehicle at a speed greater than is reasonable and prudent under
the existing conditions, giving regard to the actual and potential hazards then existing, including
when:
(a) approaching and crossing an intersection or railroad grade crossing;
(b) approaching and going around a curve;
(c) approaching a hill crest;
(d) traveling upon any narrow or winding roadway;
(e) traveling in, through, or approaching other hazards that exist due to pedestrians, other traffic,
weather, or highway conditions; and
(f) the speed causes the person to fail to maintain control of the vehicle or stay within a single
lane of travel.
(2) Subject to Subsections (1) and (4) and Sections 41-6a-602 and 41-6a-603, the following
speeds are lawful:
(a) 20 miles per hour in a reduced speed school zone as defined in Section 41-6a-303;
(b) 25 miles per hour in any urban district; and
(c) 55 miles per hour in other locations.
(3) Except as provided in Section 41-6a-604, any speed in excess of the limits provided in this
section or established under Sections 41-6a-602 and 41-6a-603 is prima facie evidence that the
speed is not reasonable or prudent and that it is unlawful.
(4)
(a) A violation of Subsection (1) is an infraction.
(b) For an individual convicted of a speed violation where the individual was operating at a
speed of 100 miles per hour or more, the court shall impose a fine not less than 150% of the
suggested fine in the uniform fine schedule authorized in Section 76-3-301.5 and in effect at
the time of the citation.
(5) The governor by proclamation in time of war or emergency may change the speed limits on the
highways of the state.

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