Regulatory and work zone signs

Key points

1. Regulatory signs are generally black and white, although some are red and white.

   Source: Handbook p. 44

   “Regulatory Signs: Regulatory signs are generally black and white, although some are red and white.”
   Idaho Driver's Handbook, Handbook p. 44

2. At a stop sign, stop at the marked stop line; if there is none, stop before the crosswalk on the near side.

   Source: Handbook p. 44

   “When approaching a stop sign, you must stop at a clearly marked stop line. If no stop line, then stop before entering the crosswalk on the near side of the intersection.”
   Idaho Driver's Handbook, Handbook p. 44

3. At a yield sign, slow down and yield to vehicles and pedestrians, stopping if necessary.

   Source: Handbook p. 44

   “You must slow down and yield the right-of-way to other vehicles and pedestrians in the intersection you are crossing or highway you are entering. If necessary, stop before crossing the intersection or entering the highway.”
   Idaho Driver's Handbook, Handbook p. 44

4. A Do Not Enter sign means you may not enter that section of highway from your direction.

   Source: Handbook p. 45

   “You may not enter this section of highway from the direction you are traveling.”
   Idaho Driver's Handbook, Handbook p. 45

5. A speed limit sign shows the maximum speed under ideal driving conditions.

   Source: Handbook p. 45

   “Speed Limit: The maximum speed limit on a section of road (under ideal driving conditions).”
   Idaho Driver's Handbook, Handbook p. 45

6. Work zones are commonly marked with orange signs, cones, drums, barricades or flashing arrow panels.

   Source: Handbook p. 46

   “These are commonly identified with orange signs, cones, drums, barricades, or flashing arrow panels.”
   Idaho Driver's Handbook, Handbook p. 46

7. Warning signs in a work zone are orange and black; never move barriers to cross a closed road.

   Source: Handbook p. 46

   “Warning signs in a work zone are orange and black. Do not go around or move any barriers or signs to cross over a road that is closed to traffic.”
   Idaho Driver's Handbook, Handbook p. 46

8. The slow moving vehicle sign means slow down and approach with caution.

   Source: Handbook p. 47

   “You are approaching a slow moving vehicle. You should slow down and approach the vehicle with caution.”
   Idaho Driver's Handbook, Handbook p. 47

9. You must follow directions from a school safety patrol.

   Source: Handbook p. 48

   “You must follow any directions issued by a school safety patrol official while driving your motor vehicle.”
   Idaho Driver's Handbook, Handbook p. 48

Recognize these signs

3 questions from the Idaho practice test

1. 1. At the pictured stop sign, where should the vehicle stop first when a marked stop line is present?

   
   1. Before the marked stop line
   2. After entering the intersection
   3. Beside the nearest parked vehicle
   4. Only after another driver arrives
   Show answer

   Before the marked stop line. A stop sign requires a complete stop at the clearly marked stop line. If there is no line, the stopping point shifts to the near-side crosswalk; without a crosswalk, stop near the intersecting highway where approaching traffic can be seen before entering. The crosswalk and intersection alternatives are fallback locations, not permission to roll beyond a visible line. A quiet intersection still requires the same full stop. Look for the painted line before the front wheels reach the crossing path.

2. 2. Which statement describes the usual colors of Idaho regulatory signs?

   1. They are always orange and black
   2. They are always yellow and green
   3. They are generally blue and brown
   4. They are generally black and white, with some red and white
   Show answer

   They are generally black and white, with some red and white. Regulatory signs communicate rules, restrictions, or required actions. Idaho describes them as generally black and white, while noting that some are red and white. Yellow and green are associated with warning signs and school warnings, orange and black commonly identify work-zone warnings, and blue or brown serve other sign purposes. When a sign controls what drivers may do, consider the regulatory category before interpreting the particular symbol or wording.

3. 3. In an Idaho work zone, what do orange and black warning signs identify?

   1. Work zone warnings requiring attention to hazards and changing conditions
   2. A permanent guide route for interstate travelers
   3. A recreational area where vehicles may stop in any lane
   4. A special lane where barriers may be moved by motorists
   Show answer

   Work zone warnings requiring attention to hazards and changing conditions. Orange and black warning signs are associated with work zones, where uneven pavement, narrow lanes, equipment, and gravel can create immediate hazards. Drivers should pay attention and follow the displayed controls. The guide-route choice confuses work-zone coloring with directional information. A work area is not a general stopping place, and drivers must never move its barriers or signs to cross a closure. Slow down, leave space, and expect workers and lane shifts close to traffic.

Source: the Idaho Driver's Handbook, Highway & Vehicle Knowledge. This lesson is a plain English summary, not the law itself; where it differs, the manual and the statute govern. Last checked 2026-09-27.