Speed limits — Utah Permit Test

Utah’s basic speed law says a driver may never drive faster than is reasonable and prudent under the existing conditions.

The posted number assumes a dry road in daylight. On ice at night the legal speed can still be far too fast.

In Utah, the basic speed law states that you may never drive faster than is reasonable and prudent under the existing conditions.

Where no sign is posted and no special hazard exists, the Utah speed limit passing a school building or grounds during recess is 20 miles per hour.

Twenty is roughly the speed at which a child struck by a car usually lives. That is the whole reason for the number.

20 miles per hour: • When passing a school building or grounds during school recess.

The Utah speed limit in any business or residential area is 25 miles per hour where no sign is posted.

These are the streets with driveways, parked cars and children. Twenty-five is what leaves room to stop for any of them.

25 miles per hour: • In any business or residential area.

The Utah speed limit on major highways is 55 miles per hour, as posted.

A major highway is not a freeway. The traffic on it crosses and turns, which is why the number is lower.

55 miles per hour: • On major highways, as posted.

Utah rural interstate highways carry speed limits of 65, 70, 75, or 80 miles per hour.

Utah posts some of the highest limits in the country out here, and the transition down to them is marked rather than guessed.

65/70/75/80 miles per hour: • On rural interstate highways.

Utah speed transition zones are indicated with pavement markings and additional signs.

The limit does not drop in one step out here. The markings are the warning that it is about to.

The transition zones in Utah are indicated with pavement markings and additional signs.

A Utah driver also has a limit at the low end, and a peace officer may issue a citation for impeding the normal flow of traffic.

A car well below the traffic speed makes everybody else overtake, and overtaking is where the crashes happen.

Peace officers are allowed to issue you a citation if you are impeding the normal flow of traffic.

What does Utah’s basic speed law require?

A speed that is reasonable and prudent. The posted number assumes a dry road in daylight. On ice at night the legal speed can still be far too fast. Utah Driver Handbook 2026-2027, p.44: “In Utah, the basic speed law states that you may never drive faster than is reasonable and prudent under the existing conditions.”