Following distance — Ohio Permit Test
Following distance on the Ohio permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A driver keeps a minimum following distance of one vehicle length for every ten miles per hour, or four seconds behind the vehicle ahead.
Seconds work at any speed, which is why the four-second count is the one worth learning.
Always try to keep a minimum following distance of one vehicle length for every 10 miles per hour of travel, or four seconds between your vehicle and the vehicle ahead.
The four-second gap is measured by starting to count when the vehicle ahead passes a fixed point and seeing whether you reach it before the count ends.
It needs no instruments and works at any speed, which is the point of measuring in time.
When the rear of the vehicle ahead passes a stationary point, such as a sign or pole, begin counting the seconds it takes you to reach that same stationary point - "one-thousand-one, one-thousand-two, one-thousand-three, one-thousand-four.
Following distance should be increased in poor visibility or at night, on slippery roads, behind large vehicles, and behind vehicles that must stop at railroad crossings.
Behind a truck the gap buys sight as well as time, because you cannot see past it.
Increase your following distance when: Visibility is lessened or limited by the weather (fog, rain, snow, etc.), or at night. On slippery roads.
On the test
What minimum following distance does the manual give?
Four seconds behind the vehicle ahead. Seconds work at any speed, which is why the four-second count is the one worth learning. Digest of Ohio Motor Vehicle Laws, p.38: “Always try to keep a minimum following distance of one vehicle length for every 10 miles per hour of travel, or four seconds between your vehicle and the vehicle ahead.”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
What it costs
- One payment, once — not a subscription. Nothing renews and there is nothing to cancel, for an exam you sit one time.
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- Paying opens the rest of the cards, unlimited full-length practice tests, and retests built from exactly the questions you got wrong.
- Every level up to Prepared — 3 tests passed in a row.
- Do the work, fail the real exam, and we refund you.
Where these come from
Every rule here is checked against Digest of Ohio Motor Vehicle Laws, published by the Ohio Department of Public Safety, and against the state code itself. Last checked 2026-09-14.