20 questions from the Illinois Rules of the Road (DSD A 112). Pick an answer to see the rule behind it.
1. Under what condition is it permissible for pedestrians ages 18 or older to skate on public roadways?
Answer: When the posted speed limit is 45 mph or less from sunrise to sunset. The handbook specifies that skating is allowed on roadways with a speed limit of 45 mph or less, specifically between sunrise and sunset.
Illinois Rules of the Road (DSD A 112), page 46: “Pedestrians ages 18 or older may skate on public roadways where the posted speed limit is 45 mph or less from sunrise to sunset as long as vehicular traffic is not impeded or obstructed.”
2. When approaching a disabled vehicle using hazard lights on a four-lane highway, what does Illinois law require a driver to do if it is safe?
Answer: Change lanes away from the disabled vehicle. The handbook states that drivers must change lanes away from the hazard when safe, rather than increasing speed or stopping.
Illinois Rules of the Road (DSD A 112), page 51: “Illinois law requires drivers to change lanes away from the disabled vehicle if it is safe to do so.”
3. During times of congestion, what is the advised method for merging when lanes are reduced?
Answer: Use both lanes to advance to the lane reduction point and merge alternating turns (zipper merge). The handbook distinguishes between non-congested and congested scenarios, advising the 'zipper merge' technique specifically for congested conditions to optimize lane usage.
Illinois Rules of the Road (DSD A 112), page 78: “During times of congestion, it is advised that you use both lanes to advance to the lane reduction point and merge at that location, alternating turns. This is also known as the “zipper merge”, as two sides merge into one like a zipper.”
4. Under what condition may a motorcyclist proceed through an intersection if the light remains red?
Answer: If the light fails to turn green after 120 seconds. The handbook sets a specific time limit of 120 seconds for a stuck red light before a motorcyclist is permitted to proceed with caution.
Illinois Rules of the Road (DSD A 112), page 47: “If a red light fails to turn green after 120 seconds, a motorcyclist may proceed through an intersection after yielding the right of way to oncoming traffic.”
5. Which of the following conditions allows a driver to receive a Monitoring Device Driving Permit (MDDP)?
Answer: Being a first-time DUI offender serving a statutory summary suspension. The handbook defines the MDDP specifically for first-time DUI offenders serving a statutory summary suspension, distinguishing it from other permits based on age or violation count.
Illinois Rules of the Road (DSD A 112), page 67: “Monitoring Device Driving Permit (MDDP) — Allows a first-time DUI offender serving a statutory summary suspension to operate a motor vehicle equipped with a Breath Alcohol Ignition Interlock Device (BAIID).”
6. Under what condition is it permissible to back up on a roadway that is not a controlled-access roadway?
Answer: Only if done safely and without interfering with other vehicles. The rule allows backing up on non-controlled-access roadways only if it is safe and does not interfere with other traffic.
Illinois Rules of the Road (DSD A 112), page 36: “You may not back up on other roadways unless it is done safely and does not interfere with other vehicles.”
7. When approaching a stationary emergency vehicle displaying oscillating, rotating, or flashing lights, what action does Illinois law require if a lane change is possible?
Answer: Change to a lane away from the emergency workers when possible. The handbook states that drivers should move to a lane away from workers if possible when approaching stationary emergency vehicles with active lights.
Illinois Rules of the Road (DSD A 112), page 31: “Illinois law requires motorists to yield, change to a lane away from the emergency workers when possible, and proceed with caution.”
8. Why are Advance Warning signs (Stop Ahead, Yield Ahead, Signal Ahead) used in high-speed areas?
Answer: Because of the longer distance needed to slow down or stop. The handbook explains that these signs are placed earlier in high-speed zones specifically to provide sufficient distance for drivers to decelerate safely.
Illinois Rules of the Road (DSD A 112), page 76: “Advance warning Stop Ahead Yield Ahead Signal Ahead signs are also used in high-speed areas because of the longer distance needed to slow down or stop.”
9. When approaching a railroad crossing that has no warning signals, such as electric flashing lights or gates, what action should a driver take?
Answer: Look, listen and slow down. The handbook instructs drivers to look, listen, and slow down when approaching a railroad crossing without active warning signals.
Illinois Rules of the Road (DSD A 112), page 45: “When approaching a railroad crossing that has no warning signals (such as electric flashing lights or gates), a driver should look, listen and slow down.”
10. What does a five-sided yellow or yellow-green sign with black symbols indicate?
Answer: Either SCHOOL ZONE or SCHOOL CROSSING. The handbook defines the specific shape and color combination of the five-sided sign as indicating a school zone or school crossing.
Illinois Rules of the Road (DSD A 112), page 71: “This five-sided sign is yellow or yellow-green with black symbols. It means either SCHOOL ZONE or SCHOOL CROSSING.”
11. On which type of street is a low-speed vehicle permitted to operate?
Answer: Any street with a posted speed limit of 30 mph or less. The rule specifies that these vehicles are restricted to streets with speed limits of 30 mph or lower, excluding higher-speed highways.
Illinois Rules of the Road (DSD A 112), page 52: “Low-speed vehicles may operate on any street with a posted speed limit of 30 mph or less unless prohibited by the local municipality.”
12. When exiting an alley or driveway in an urban area, when must you come to a complete stop?
Answer: Before entering the sidewalk area. The rule requires a complete stop before entering the sidewalk area to properly yield to pedestrians and traffic.
Illinois Rules of the Road (DSD A 112), page 40: “In urban areas, you must come to a complete stop when moving out of an alley, building, private road, or driveway and before entering the sidewalk area.”
13. Under what specific condition may a driver turn left at a red light?
Answer: When turning from a one-way street onto another one-way street that has traffic moving to the left. The handbook specifies that left turns on red are permitted only when moving from one one-way street to another one-way street with traffic moving left.
Illinois Rules of the Road (DSD A 112), page 84: “You also may turn left at a red light when turning from a one-way street onto another one-way street that has traffic moving to the left.”
14. What do white stop lines on each side of the track indicate at a railroad crossing?
Answer: Where to stop when a train is approaching. The handbook specifies that these white lines designate the stopping point for motorists when a train is approaching.
Illinois Rules of the Road (DSD A 112), page 88: “White stop lines on each side of the track show motorists where to stop when a train is approaching.”
15. Which lane is designated for passing and turning according to the lane usage rules?
Answer: The left lane. The handbook clearly assigns the function of passing and turning to the left lane, while slower traffic belongs in the right lane.
Illinois Rules of the Road (DSD A 112), page 53: “The left lane is for passing and turning.”
16. Which of the following is prohibited when parking a vehicle between sunset and sunrise?
Answer: Parking without displaying front and rear parking lights. The rule requires parking lights to be displayed between sunset and sunrise unless the vehicle is in an urban district, making it prohibited to park without them outside those conditions.
Illinois Rules of the Road (DSD A 112), page 42: “On a highway between sunset and sunrise unless the front and rear parking lights are displayed or the vehicle is within an urban district where lights are not required.”
17. What is the correct procedure if you miss your exit while driving on an expressway?
Answer: Go to the next available exit. The handbook instructs drivers to proceed to the next exit and notes that backing up is illegal.
Illinois Rules of the Road (DSD A 112), page 93: “If you miss an exit, go to the next available exit. Backing up on an expressway is against the law.”
18. Under what condition may a driver cross a solid yellow line on their side of the center line?
Answer: To turn left into or from an alley, private road, or driveway. The handbook lists specific exceptions for crossing solid yellow lines, including turning left into or from an alley, private road, or driveway.
Illinois Rules of the Road (DSD A 112), page 86: “You may cross it to turn left into or from an alley, private road, or driveway.”
19. When making a left turn, how should the vehicle's wheels be positioned until starting to make the turn?
Answer: Pointed straight ahead. The instructions for left turns state that wheels should point straight ahead until the turn begins.
Illinois Rules of the Road (DSD A 112), page 37: “Point the wheels straight ahead until starting to make the turn.”
20. When is a vehicle NOT required to stop for a stopped school bus?
Answer: When both vehicles are on a four-lane roadway and the bus is stopped in the opposite direction. The handbook specifies that stopping is not required only when on a four-lane roadway with the bus in the opposite direction; other listed scenarios require stopping.
Illinois Rules of the Road (DSD A 112), page 38: “A vehicle is not required to stop for a school bus when both vehicles are on a four-lane roadway and the bus is stopped in the opposite direction from which a driver is traveling.”