Idaho Traffic Laws and Safe Driving Practices
What this domain tests
This domain checks whether you can teach Idaho road rules as operating rules, not trivia. Expect questions on speed and space management, right-of-way, impaired driving, occupant protection, sharing the road, and Idaho-specific rules such as the bicycle Idaho Stop and the move-over law.
Core rules
Idaho's basic speed rule: posted limits are maximums, not targets. Statutory defaults include 35 mph in urban districts and 55 mph on many rural highways unless posted otherwise; some rural interstate segments are posted 80 mph. In rain, snow, ice, fog, or heavy traffic, reduce speed and increase following distance beyond the normal three-second guide.
At a four-way stop, first to stop goes first; if simultaneous, yield to the vehicle on your right. Left-turning drivers yield to oncoming traffic and pedestrians. A stop sign requires a full stop at the limit line or crosswalk, not a rolling check.
Idaho law lets bicyclists treat a stop sign as a yield and a red light as a stop-then-proceed after yielding; this does not apply to motor vehicles. The move-over law requires drivers to move over a lane when safe or slow down for stopped emergency, tow, or roadside vehicles with lights.
Seat belts are required, and child passengers must use approved restraints under Idaho's child-restraint law. Texting while driving is prohibited for all drivers. The adult DUI threshold is 0.08 percent BAC, with lower limits for under-21 and commercial drivers; implied consent applies to chemical testing.
Worked example
A student approaches a four-way stop at the same time as a car on the right. The student stops, then starts to go because 'I was here first.' Ask the student to identify the tie rule: when arrivals are simultaneous, the driver on the right has right-of-way. The correct action is to yield, then proceed when clear.
Traps
Do not treat the posted limit as automatically safe on a curve or in rain. Do not let a student roll a stop because no traffic is visible. Do not apply the Idaho Stop to cars. Do not forget move-over or school-zone and work-zone speed reductions.