You have a skid 11 feet wide, or a machine past 90,000 pounds, and the carrier wants to know who is handling the Texas oversize permit. One state agency issues it, the permit carries the name of the carrier doing the hauling, and the route and escorts hinge on numbers you supply up front.
What counts as oversize or overweight in Texas
Two standards matter and shippers confuse them. The legal limit is what a truck carries with no permit; the permit ceiling is higher. Legal limits, per TxDMV and Texas Transportation Code Chapter 621:
| Dimension | Legal limit, no permit |
|---|---|
| Width | 8 ft 6 in |
| Height | 14 ft |
| Single motor vehicle length | 45 ft |
| Truck-tractor | No state limit |
| Semitrailer, truck-tractor combination | 59 ft |
| Two-vehicle combination, non-truck-tractor | 65 ft |
| Front overhang | 3 ft |
| Rear overhang | 4 ft |
| Gross weight | 80,000 lb |
| Single axle | 20,000 lb |
| Tandem axle group | 34,000 lb |
| Triple axle group | 42,000 lb |
| Quad axle group | 50,000 lb |
Width is measured at the widest points, excluding safety devices; weight includes tractor, trailer and freight. Two footnotes decide real loads. Axles in a group must sit at least 40 inches apart to earn those ratings. And gross weight is not simply the 80,000 mark, because Texas applies the federal bridge formula: TxDMV's permissible weight table allows a five-axle combination 73,000 pounds across 40 feet of bridge and 80,000 across 51 feet. Shorten the span and the legal gross drops with it.
A permit raises the ceiling to 16 feet wide on the Interstate System, or 20 feet wide, 18 ft 11 in high and 125 feet long with a route inspection certification on file. Permit axle weights run to 25,000 lb single, 46,000 lb tandem, 60,000 lb tridem and 81,400 lb on five axles, capped by 650 lb per inch of tire.
Which Texas oversize permit you need
TxDMV issues dozens of types. Nearly all heavy haul and oversize freight out of Houston falls into three.
General single-trip. The workhorse: one movement, specific origin to destination, on the dates printed on it, for non-divisible loads up to 254,300 pounds. Not for divisible cargo that could otherwise move legally, or intermodal containers.
30, 60 or 90-day width or length. A time permit, not a trip permit, and narrower than people assume. Overwidth tops out at 13 feet wide, 14 feet high, legal length. Overlength tops out at 8 ft 6 in wide, 14 feet high, 110 feet long, with weight legal. The catch: the permittee does its own routing.
Superheavy. Required above 254,300 pounds combined, when any axle or axle group exceeds maximum permit weight, or between 200,001 and 254,300 pounds with under 95 feet of axle spacing. A different animal: a signed certification, a loading diagram, and a bridge analysis by a TxDOT-approved private engineer at your expense.
When a route survey is required. Anything over 20 feet wide, 18 ft 11 in high or 125 feet long needs a Route Inspection Certification first. A company representative physically drives the route and signs off, and TxDMV wants it three to five days ahead. It is the most common reason a big load slips a day.
Who actually pulls the Texas oversize permit
Worth being blunt here. The permit is issued to the company name attached to the USDOT number on the application, and that name must match the company operating the truck. A mismatched name is a violation and can be charged as a Class C misdemeanor. A broker cannot buy a permit in its own name and hand it to somebody else's truck. So a freight agent orders it on the carrier's behalf, under the carrier's authority, with that carrier's USDOT and axle spacing.
On Passa loads, Mikel arranges it up front rather than leaving it to whoever shows up at the dock. Dimensions and weight are locked before dispatch, the permit goes in under the hauling carrier's USDOT, the route is checked against the Houston District restriction list, escorts are booked if the load triggers them, and the copy is confirmed before the truck leaves. If a carrier says they will sort it out when they arrive, the load is not ready.
How long it takes and what slows it down
TxPROS, the state system, runs around the clock and many permit types are self-issuance. Permits needing review are processed in business hours; the permit office is (800) 299-1700. With dimensions in hand, a clean single trip issues fast.
- Route inspection. Over 20 feet wide, 18 ft 11 in high or 125 feet long means someone physically runs the route, and TxDMV asks for three to five days.
- Superheavy engineering. TxDMV's superheavy page says three to four weeks ahead; the Motor Carrier Handbook and the MCD-305 form say six to eight. Plan on eight.
- Escorts and law enforcement. Over 20 feet wide in the Houston District means front and rear law enforcement escorts, scheduled not summoned. Loads 17 ft 6 in or taller need the permit emailed to the Houston District Signal Shop 48 hours ahead, and signal contractors may raise poles at the mover's cost.
- Holidays. On New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas, permitted size drops to 14 feet wide, 16 feet high and 110 feet long, absent a TxDOT exception.
- Night movement. Permits run daytime only, 30 minutes before sunrise to 30 minutes after sunset, except overweight-only loads and Interstate loads under 10 feet wide and 100 feet long.
When you need escorts or pilot cars
Thresholds are set by dimension, and a load that trips two needs escorts for both. TxDMV's table:
| Dimension | Measurement | Escorts required |
|---|---|---|
| Width | Over 14 ft to 16 ft | 1 front, two-lane; 1 rear, multi-lane |
| Width | Over 16 ft | 1 front and 1 rear, all roads |
| Height | Over 17 ft | 1 front, with height pole |
| Height | Over 18 ft | 1 front with height pole and 1 rear, all roads |
| Length | Over 110 ft to 125 ft | 1 front, two-lane; 1 rear, multi-lane |
| Length | Over 125 ft | 1 front and 1 rear, all roads |
| Front overhang | Over 20 ft | 1 rear, all roads |
| Rear overhang | Over 20 ft | 1 rear, all roads |
An escort must be a single unit of 1,000 to 10,000 pounds GVW, with amber lights, a yellow OVERSIZE LOAD or WIDE LOAD sign 5 to 7 feet long, and two-way radio contact with the truck. Anything over 17 feet tall needs a front escort with a nonconductive height pole.
Common reasons loads get stopped at a scale
A permit is permission to move one load, one route, stated conditions. Officers check all three.
- The load does not match the permit. Dimensions estimated at booking, skid measured larger on the dock. The permit is void for that load. It bites hardest on transformers and switchgear, where the shipping skid rarely matches the unit.
- Axle weights are over while gross is under. Permits authorize axle and axle-group weight, not a total. Poor load placement fails an axle check at a legal gross.
- Weight has to come off. Under Texas Transportation Code 621.403 and 621.404, a load more than 5 percent over the legal maximum must be reduced before the truck moves. That means a crane you did not book.
- The route was not followed. Cutting onto a load-restricted road or unapproved bridge leaves the driver outside the authority.
- A restriction changed. TxDMV's district lists update constantly. The Houston sheet carries dozens of entries, including a 14-foot height limit inside I-610.
- The name does not match, or the copy is not in the truck.
What to have ready when you request a quote
- Dimensions. Overall width, height and total length including overhang. Measure the load, not the drawing.
- Weight. Gross, with axle weights or a scale ticket if you have them. Over 200,000 pounds needs a Shipper's Certificate of Weight, Form 2280, hand-signed within 90 days.
- Load method. RGN, double drop, step deck, multi-axle or its own wheels. That sets loaded height, and the trailer types page compares decks.
- Ready date, and your flex.
- Origin and destination, exact addresses. Permits are written to specific points.
- Whether it can be dismantled. Non-divisible is the legal test. If it can be hauled legally in pieces, TxDMV expects that.
- Site access. Crane capacity, gate width, overhead lines, turning radius.
Frequently asked questions
Do I need a Texas oversize permit for a load exactly 8 ft 6 in wide?
No, that is the legal width limit. Measure with tarps and straps on, because enforcement measures the widest point.
Who gets the permit, the shipper or the carrier?
The permit must carry the name of the company operating the truck, so it is ordered against that carrier's USDOT number. On Passa loads that is before dispatch.
Can one permit cover multiple loads?
Only a time permit. A general single trip covers one movement between one origin and one destination. A 30, 60 or 90-day permit covers repeat loads, but only inside one of two separate envelopes: overwidth up to 13 feet wide and 14 feet high at legal length, or overlength up to 110 feet at 8 ft 6 in wide and 14 feet high.
How far ahead should I book an oversize load out of Houston?
Days, not weeks, for a routine single trip with dimensions confirmed. Add three to five days over 20 feet wide, 18 ft 11 in high or 125 feet long. Superheavy runs six to eight weeks, plus escort time over 20 feet wide.
What happens if the load is heavier than the permit says?
You stop. Texas allows a 5 percent tolerance before an officer requires the load reduced. Above that, the truck sits until the weight comes off. Re-weigh before dispatch, not at the ramp.
Moving an oversize load out of Houston
If your load is over 8 ft 6 in wide, 14 feet tall, 59 feet long or 80,000 pounds, it needs a permit, and the permit is not the hard part once somebody owns it. Send the dimensions, weight, load method and ready date, and we will tell you which permit applies, what the route looks like, whether escorts are triggered, and how soon the truck rolls. Request a quote online, or call (541) 951-4426.