In addition to "absolute speed limits" (see below), Idaho's "basic speeding law" prohibits driving at a speed greater than is reasonable and prudent under the conditions and having regard to the actual and potential hazards then existing. (Idaho Code Ann. § 49-654(1) (2017).)
A first-time speeding violator faces:
First-time offenders face up to six months in jail and/or a maximum $1,000 in fines. The motorist's driver's license will also be suspended for 30 days. (Idaho Code Ann. § § 49-326(f), 49-1401 (2017).)
Idaho's absolute speed limits are:
Idaho has what is known as an “absolute” speed limit law. There's no trick to how it works: If the sign says 40 miles per hour and you drive 41 miles per hour or more, you have violated the law. In other words, you are guilty if you drive over the speed limit. In Idaho you may be able to make three possible defenses:
Note that in Idaho you can be ticketed for driving at an unsafe speed, even if that speed does not violate the posted limit—for example, driving exactly at the maximum posted limit on the freeway amidst slower and heavy traffic, in a dense fog, or in a driving rainstorm or blizzard.
A speeding violation will add points to a driver's record. An offender's license is suspended for 30 days, 90 days or 6 months, if they respectively accumulate 12 points within 12 months, 18 points within 24 months or 24 points within 36 months. However, three points are deducted from a driver's record if they attend traffic school prior to a suspension; this can only occur once in a 3-year period.