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What does Utah's Basic Speed Law require of every motorist?
The answer
Answer: B. Utah's Basic Speed Law states that no person shall operate a motor vehicle at a speed greater than is reasonable and prudent under existing conditions, hazards, and roadway circumstances. Regardless of the posted limit, drivers must adjust speed for weather, traffic, and visibility. The handbook adds that when there is no sign and no special hazard, 25 mph is permitted in any business or residential area.
Source: Utah Driver Handbook — Section 9: Rules of the Road (p. 44)