Idaho Road Sign Practice Test

How road signs are tested in Idaho

Road sign questions are part of the Idaho written knowledge test (40 multiple-choice questions, 34 right to pass). Know the signs well and those questions become easy points.

Signs from the Idaho Driver's Handbook (July 2026). What every kind of sign means, by shape and color: our road sign guide.

Signs the Idaho Driver's Handbook adds

• Work Zone Signs

  The slow-moving vehicle emblem means you are coming up on a slow vehicle, usually farm or construction equipment; slow down and approach with caution. p. 47

• Warning Signs

  At a three-way T intersection where your road ends and you must turn right or left, stop and yield to drivers coming from the other two directions. p. 49

• Intersections

  The Roundabout Ahead sign warns of a roundabout; slow down and follow roundabout rules. p. 62

• Leaving the Freeway

  The Exit Speed Advisory sign shows the advised speed for the highway exit ramp. p. 86

• Traffic Signs

  At a yield sign, if pedestrians are in the crosswalk or about to enter it, stop and wait until they have crossed before going on. p. 45

• Turn Prohibition & Lane Control Signs

  Turn prohibition signs show a turn arrow crossed by a red circle and slash, or the words NO LEFT TURN, NO RIGHT TURN or NO U TURN; the turn shown is not allowed there. p. 45

• Traffic Signals

  A steady red light means come to a complete stop before the stop line, crosswalk or intersection; you may then turn on red unless a sign prohibits it. p. 55

• Turns

  Where a sign says vehicles in the left lane must turn left and those in the right lane may turn left or go straight, drivers turning left must stay in their own lane until the turn is finished. p. 73

• Work Zone Signs

  The orange Be Prepared to Stop work zone sign means slow down and be ready to stop for road work ahead. p. 47

• Barricades

  On a barricade, a V-shaped stripe pattern means the road is closed and traffic can go no further; stripes angling down to the left mean pass on the left, and stripes angling down to the right mean pass on the right. p. 54

• Guide Signs

  Blue signs mean: motorist services. p. 53

• Guide Signs

  Brown signs mean: recreation and cultural places. p. 53

• Handicapped Parking

  Spaces marked with the disability symbol are reserved for vehicles showing the symbol on a license plate or a special card; others may be fined for parking there. A person with a disability may park such a vehicle in reserved spaces without paying and for unlimited time. p. 82

• Warning Signs

  Some Pedestrian Crossing signs have lights that flash while someone is crossing. Pedestrians there have the right-of-way, so be ready to stop. p. 51

• Warning Signs

  The round Railroad Crossing warning sign gives early warning of tracks ahead; be ready to stop before the tracks if a train is coming. p. 52

• Warning Signs

  The blue Emergency Notification System sign at or near a railroad crossing lists the railroad's phone number and the crossing's own number, so you can report an emergency or a broken warning device. p. 53

• Warning Signs

  Diamond-shaped signs warn of hazards or special conditions ahead. p. 49

• Warning Signs

  A pennant-shaped sign (a sideways triangle) marks a no-passing zone. p. 52