Vehicle equipment, seat belts and child seats

Key points

1. Tires need at least 1/16 inch of tread with no major bumps, bulges or damage.

   Source: Section 2

   “Tires with a minimum of 1/16-inch tread depth and no major bumps, bulges, or damage”
   Ohio Driver Manual, Digest of Motor Vehicle Laws, Section 2

2. You need a taillight visible from 500 feet and two brake lights visible from 500 feet.

   Source: Section 2

   “One taillight that emits red light, visible from 500 feet Two red stop lights (brake lights) visible from 500 feet when the brakes are applied”
   Ohio Driver Manual, Digest of Motor Vehicle Laws, Section 2

3. Turn signals must be visible from 300 feet.

   Source: Section 2

   “Turn signals in working order, visible from 300 feet:”
   Ohio Driver Manual, Digest of Motor Vehicle Laws, Section 2

4. The horn must be audible from 200 feet.

   Source: Section 2

   “Horn in good working order, audible from 200 feet, and identifiable as a motor vehicle horn”
   Ohio Driver Manual, Digest of Motor Vehicle Laws, Section 2

5. Studded tires are legal from November 1 through April 15.

   Source: Section 2

   “In Ohio, studded tires are legal from November 1 through April 15.”
   Ohio Driver Manual, Digest of Motor Vehicle Laws, Section 2

6. Keep at least 10 inches between your chest and the steering wheel for air bag deployment.

   Source: Section 2

   “There is at least 10 inches between your chest and the steering wheel to allow appropriate space for airbag deployment.”
   Ohio Driver Manual, Digest of Motor Vehicle Laws, Section 2

7. Drivers and front seat occupants must wear safety belts.

   Source: Section 2

   “Drivers and front seat occupants must wear safety belts.”
   Ohio Driver Manual, Digest of Motor Vehicle Laws, Section 2

8. For drivers under 18, occupants may not outnumber the belts, and everyone must buckle up.

   Source: Section 2

   “For drivers under age 18, the number of vehicle occupants is limited to the number of safety belts originally installed and all occupants must wear safety belts.”
   Ohio Driver Manual, Digest of Motor Vehicle Laws, Section 2

9. Children 4 to under 8 need a booster seat unless they are 4 feet 9 inches or taller.

   Source: Section 6

   “When any child who is at least age 4, but less than age 8, is being transported in a motor vehicle, the vehicle operator shall have the child properly restrained in a booster seat unless the child is 4-foot 9-inches in height, or taller.”
   Ohio Driver Manual, Digest of Motor Vehicle Laws, Section 6

Numbers to know

3 questions from the Ohio practice test

1. 1. What is the Ohio minimum tread depth for a tire to be considered safe?

   1. 1/32 inch
   2. 1/8 inch
   3. 1/4 inch
   4. 1/16 inch
   Show answer

   1/16 inch. The Ohio manual says a tire in safe condition has at least 1/16 inch of tread depth on the road surface and no major bumps, bulges, breaks, or tread damage. The smaller 1/32-inch figure is below the manual's stated minimum, while the larger measurements are not the threshold given here. A practical check uses a penny in the deepest groove: if all of Lincoln's head is visible, the tire is too worn and should be replaced.

2. 2. How much space should be between a properly adjusted driver's chest and the steering wheel?

   1. Exactly 6 inches
   2. At least 4 inches
   3. At least 10 inches
   4. No more than 2 inches
   Show answer

   At least 10 inches. The Ohio manual recommends at least 10 inches between the driver's chest and the steering wheel. That space supports appropriate airbag deployment while still allowing full control of the pedals and wheel. The smaller distances in the other choices leave less room for the restraint system to work as intended, and an exact six inch setting is not the manual's measurement. Adjust the seat before driving, then confirm that your view, reach, and foot movement remain comfortable without moving your body close to the wheel.

3. 3. When must an Ohio child use a booster seat rather than only a safety belt?

   1. At least age 4 but under age 8, unless 4 feet 9 inches or taller
   2. Only after turning 12 years old
   3. Only if the child weighs less than 20 pounds
   4. Whenever the vehicle has no rear seat
   Show answer

   At least age 4 but under age 8, unless 4 feet 9 inches or taller. Ohio requires a booster seat for a child who is at least 4 but younger than 8 unless the child is 4 feet 9 inches or taller. The age-12 choice is wrong because the booster rule applies much earlier and ends based on age or height. Use the child’s age and height as the cue before every trip. A regular safety belt alone is not enough for a child in that range who has not reached the height threshold.

Source: the Ohio Driver Manual, Digest of Motor Vehicle Laws, Section 2: Before You Drive. 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.