Sharing with trucks — Texas Permit Test
Sharing with trucks on the Texas permit test — 12 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Trucks have longer stopping and accelerating distances, a wider turning radius, and weigh more than cars.
Everything a truck does takes longer and takes more room. Driving near one means leaving room for all of it.
Trucks have longer stopping and accelerating distances, a wider turning radius, and weigh more.
On a level highway it takes three to five seconds longer to pass a truck than to pass a car.
The truck is simply longer, so the pass takes more road. Those seconds are spent in the oncoming lane.
On a level highway, it takes three to five seconds longer to pass a truck than a car
An average passenger car traveling at 55 mph can stop in approximately 240 feet, about three-fourths the length of a football field.
It is the figure to hold beside the truck one. The gap between them is the whole point of the comparison.
The average passenger car traveling at 55 mph can stop in approximately 240 feet, which is about three-fourths the length of a football field
A fully loaded tractor-trailer may take more than 400 feet to stop completely, well over the length of a football field.
That is nearly twice what a car needs from the same speed. Cutting in front of one takes that distance away.
more than 400 feet to completely stop, well over the length of a football field
If a driver cannot see the truck driver in the truck's side mirror, the truck driver cannot see them.
It is the one rule of thumb that works from the car. The mirror tells you whether you exist to the other driver.
the truck driver in his side mirror, he can’t see you
A driver following a truck at night should always dim the headlights, because bright lights reflect off the truck's large side mirrors.
The mirrors throw the beam straight back into the driver's eyes. It is worse on a truck than on a car.
you follow a truck at night always dim your headlights
A driver stopped behind a truck on an upgrade should leave space in case the truck drifts back, and keep to the left in their lane so the driver can see them.
A heavy truck rolls back before it pulls away. The space is what keeps the car out of it.
If you are stopped behind a truck on an upgrade, leave space in case the truck drifts back when it starts to move
Trucks make wide right turns and sometimes leave an open space to the right just before the turn, so a driver should not pass a truck on the right if it might be turning right.
That open space is where the truck is about to swing. Taking it puts the car under the trailer.
Trucks make wide, right turns and sometimes leave an open space to the right just before the turn
A driver should never cross behind a truck preparing to back up, and should wait for the truck to finish before trying to pass.
The truck driver cannot see directly behind at all. The road is blocked for a minute rather than for good.
Never cross behind a truck preparing to back up
A driver should never cut in front of a truck, because cutting into the open space in front of it removes the driver's cushion of safety.
The space in front of a truck is its stopping distance, not a gap. Taking it means the truck has none left.
Never cut in front of a truck. Cutting into the open space in front of a truck or bus removes the driver’s cushion of safety
Because of its large size a tractor-trailer often appears to be traveling more slowly than it is, and many car and truck collisions happen at intersections for that reason.
The size fools the eye into reading it as further away and slower. Pulling out in front of one is the result.
truck collisions take place at intersections because the driver of the car does not realize how close the truck is or how quickly it is approaching.
On multi-lane highways tractor-trailers stay in the center lane to help the flow of local traffic on and off the highway.
It keeps the right lane free for merging and gives the truck somewhere to go. Both are about not having to stop.
On multi-lane highways, tractor-trailers stay in the center lane to help the flow of local traffic on and off the highway
On the test
How does a truck differ from a car in Texas traffic?
It stops and accelerates over a longer distance. Everything a truck does takes longer and takes more room. Driving near one means leaving room for all of it. Texas Driver Handbook, p.51: “Trucks have longer stopping and accelerating distances, a wider turning radius, and weigh more.”
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.
- Free to start: a 10-question test and the first section of cards. No sign-up and no account.
- 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 Texas Driver Handbook, published by the Texas Department of Public Safety, and against the state code itself. Last checked 2026-09-16.
- src/assets/drivers-manuals/TX.pdf (Texas Driver Handbook, form DL-7, Revised January 2026, Texas Department of Public Safety, retrieved 2026-09-14 from dps.texas.gov)
- src/assets/drivers-manuals/TX.pages.txt (plain pdftotext over that PDF; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json (sha256, folio offset 6, nonLawPages, the four extraction traps and the extraction flag, each with its measured basis)
- docs/plans/texas-exam-shape.md (the search that established that no official source states the question count, and the two decoys it disposes of)