Without a permit or special exception, what is the general Texas width limit for a freight truck and load, excluding authorized safety devices?
Correct answer: 102 inches
The ordinary limit is 8 feet 6 inches. Passenger-car provisions and specially authorized loads differ.
Source: Texas Transportation Code §621.201(a) ↗
What is the general Texas maximum height of a freight vehicle with its load, without a permit or exception?
Correct answer: 14 feet
Measure the vehicle and load together; a separate route-clearance check is still necessary.
Source: Texas Transportation Code §621.207(a) ↗
Your truck is 13 feet 10 inches high. What must you ensure under Texas law before passing structures on the route?
Correct answer: It can pass each vertical clearance without touching
The statute expressly places this clearance duty on operators of vehicles higher than 13 feet 6 inches.
Source: Texas Transportation Code §621.207(b) ↗
What is the ordinary Texas maximum length for a single freight motor vehicle other than a truck-tractor, with no permit or special exception?
Correct answer: 45 feet
Do not substitute the semitrailer or combination limit for the single-vehicle limit.
Source: Texas Transportation Code §621.203(a) ↗
In an ordinary Texas truck-tractor and semitrailer combination, how long may the semitrailer be without a permit or exception, excluding its towing device?
Correct answer: 59 feet
This limit applies to the semitrailer, not the entire tractor-semitrailer combination.
Source: Texas Transportation Code §621.204(a) ↗
What ordinary length limit applies to each trailer or semitrailer in a Texas truck-tractor, semitrailer and trailer combination, excluding towing devices?
Correct answer: 28 feet 6 inches
The twin-trailer limit is separate from the 59-foot semitrailer limit for a two-vehicle tractor combination.
Source: Texas Transportation Code §621.204(b) ↗
Without a special exception, what overall Texas length limit applies to an ordinary truck-and-trailer combination that is not a truck-tractor combination?
Correct answer: 65 feet
Vehicle configuration matters: do not apply this limit indiscriminately to truck-tractor combinations.
Source: Texas Transportation Code §621.205(a) ↗
Without a permit or other legal exception, what are the ordinary Texas front and rear load-extension limits?
Correct answer: 3 feet in front and 4 feet at the rear
Extensions are measured beyond the vehicle or combination; special loads can have additional provisions.
Source: Texas Transportation Code §621.206(a) ↗
For an ordinary diesel freight combination with no permit or special exception, what is the Texas overall gross-weight ceiling?
Correct answer: 80,000 pounds
Axle spacing, axle weights, tires and route limits can require a lower weight. This is not an automatic allowance for every rig.
Source: Texas Transportation Code §621.101(b) ↗
Under the ordinary Texas rule, without a permit or exception, a single axle may not exceed what weight, including enforcement tolerances?
Correct answer: 20,000 pounds
Compliance with the axle limit does not remove tire, gross-weight or route restrictions.
Source: Texas Transportation Code §621.101(a)(1) ↗
What ordinary Texas maximum applies to a tandem axle, including enforcement tolerances, with no permit or exception?
Correct answer: 34,000 pounds
This is the tandem limit; the vehicle must also meet the applicable axle-group and overall-weight rules.
Source: Texas Transportation Code §621.101(a)(2) ↗
Which Texas agency issues oversize/overweight permits for applicable movements on Texas public roadways?
Correct answer: Texas Department of Motor Vehicles (TxDMV)
Obtain the appropriate permit and authorized route, when applicable, before the movement.
Source: TxDMV Oversize/Overweight Permits ↗
What information must you establish before applying for a Texas oversize/overweight permit?
Correct answer: Exact dimensions and weight of the vehicle and load
The complete loaded measurements determine the required permit type; estimates are not an adequate substitute.
Source: TxDMV — before applying ↗
A Texas freight trailer falls under the safety-flap rule. Its flaps must extend to within what distance of the highway surface?
Correct answer: 8 inches
Required guards or flaps hang behind the rearmost wheels and must meet the prescribed type and mounting requirements.
Source: Texas Transportation Code §547.606(a) ↗
A freight trailer has two super-single tires on its rearmost axle. Does replacing four standard tires remove the Texas safety-flap requirement?
Correct answer: No, two super-single tires are also covered
The statute explicitly includes at least two super-single tires, not just four conventional tires.
Source: Texas Transportation Code §547.606(a),(c) ↗
Which vehicle is expressly excluded from the Texas safety-flap rule in section 547.606?
Correct answer: A truck-tractor operated alone
The section excludes a tractor operated alone and a pole trailer. Other applicable equipment rules still matter.
Source: Texas Transportation Code §547.606(b) ↗
May a driver coast downhill on a Texas road with the transmission in neutral?
Correct answer: No
Texas prohibits neutral coasting on a downgrade. Choose an appropriate gear before descending.
Source: Texas Transportation Code §545.406(a) ↗
A truck stays in gear but the driver holds the clutch disengaged while coasting downhill. Is that allowed by Texas law?
Correct answer: No
For trucks, tractors and buses, the clutch restriction applies in addition to the neutral-coasting prohibition.
Source: Texas Transportation Code §545.406(b) ↗
Outside the statutory exception for certain structural loads, what is the maximum Texas drawbar or towing-connection distance between vehicles?
Correct answer: 15 feet
The connection must also be strong enough to pull the weight drawn. The structural-load exception is not a general exemption.
Source: Texas Transportation Code §545.409(a) ↗
A vehicle tows another using a chain, rope or cable. What Texas warning flag or cloth belongs on the connection?
Correct answer: White, at least 12 inches square
This is the connection marker; it is different from the marking requirements for an overhanging load.
Source: Texas Transportation Code §545.409(b) ↗
What color must a Texas commercial vehicle’s front clearance lamps and front-side marker lamps show?
Correct answer: Amber
The same section specifies amber for the covered reflectors and center markers.
Source: Texas Transportation Code §547.353(a) ↗
What color must clearance lamps and side marker lamps mounted at or near the rear show under Texas law?
Correct answer: Red
Do not confuse rear marker color with front or center marker color.
Source: Texas Transportation Code §547.353(b) ↗
Under the ordinary Texas special-lighting mounting rule, at what height should a reflector be installed when the low-structure exception does not apply?
Correct answer: 24 to 60 inches
If the permanent structure is below 24 inches, the statute instead specifies as high as practicable on that structure.
Source: Texas Transportation Code §547.354(a) ↗
A semitrailer is 32 feet long. Which additional side equipment does the Texas 30-foot rule require?
Correct answer: A centrally mounted marker lamp and reflector on each side
The rule specifies central markers and reflectors on both sides; the applicable hazard-lamp requirement also remains.
Source: Texas Transportation Code §547.352(3) ↗
For an ordinary motor vehicle in the Texas slow-moving definition, what is its maximum design-speed threshold?
Correct answer: 25 mph or less
This refers to design capability, not simply a faster vehicle being driven slowly. Special vehicle provisions can also apply.
Source: Texas Transportation Code §547.001(7) ↗
May a slow-moving-vehicle emblem be used on a stationary gate as a general warning marker in Texas?
Correct answer: No
Texas restricts the emblem to its intended slow-moving-vehicle use, rather than stationary objects.
Source: Texas Transportation Code §547.005(a) ↗
How must a required slow-moving-vehicle emblem be oriented and maintained?
Correct answer: Base down at the rear, clean and reflective
Mount it so its visibility is not impaired. A dirty or obstructed emblem does not provide the intended warning.
Source: Texas Transportation Code §547.703(a) ↗
Outside a business or residential district, your truck follows another truck. If conditions permit, what extra purpose must the gap serve?
Correct answer: Let a passing vehicle safely enter the space
This truck-following provision complements the general duty to keep enough clear distance to stop safely.
Source: Texas Transportation Code §545.062(b) ↗
Traffic approaches in the opposing lane while a bicycle occupies your passing path. What does the Texas commercial safety guidance recommend?
Correct answer: Slow and follow until there is room to change lanes and pass safely
Large vehicles can disturb a two-wheeler with airflow. Wait for a safe lane-changing pass rather than crowding the rider.
Source: Texas DL-7C March2026,14.6(3),PDF185 ↗
If you must back across a sidewalk into a street, which extra checks does the Texas commercial chapter describe?
Correct answer: Stop at the sidewalk for people, then check traffic again at the curb
Avoid backing into the street when a safer arrangement is possible. When unavoidable, separately check the pedestrian area and roadway.
Source: Texas DL-7C March2026,14.6(2)(h),PDF185 ↗
