Arkansas Oversize Load Permits, Regulations & Axle Rules

Arkansas treats daylight as the baseline for anything over legal dimensions. Any permitted width, height, or length exceedance moves daylight hours only, with sunrise and sunset set by NOAA's Weather Service rather than a fixed clock, so the window shifts through the year. Overweight-only loads that stay within 8'6" wide, 14' high, and legal trailer length get a full 24-hour runway: day, night, and through holidays without restriction.

The same 24-hour exception covers overlength loads when the overall combination stays at or under 90 feet and the vehicle and load do not exceed legal width or height. Push the combination over 90 feet and that flexibility evaporates. The load falls back to daylight-only with no holiday travel.

Only three holidays are complete blackouts: New Year's Day, Thanksgiving Day, and Christmas Day. That's a short list compared to most states. There's a weekend-extension trap, though: if one of those three lands on a Monday or Friday, the adjacent Saturday and Sunday are also restricted. A second group, Martin Luther King Jr. Day, Presidents Day, Veterans Day, and Christmas Eve, closes the permit office but doesn't stop travel as long as the permit is already in hand. Saturday and Sunday movement is otherwise allowed by single-trip permit unless the day falls inside a blackout.

Arkansas runs one codified rush-hour curfew: no oversize movement through the Greater Little Rock area from 7:00 AM to 9:00 AM or 4:00 PM to 6:00 PM, applying to I-30 between mile markers 138 and 143, I-40 between mile markers 151 and 155, and the full length of I-630. Outside that corridor there are no other metro curfews on permitted loads.

Weather halts any permitted move on its own: no travel when visibility drops below 500 feet or during inclement conditions including hard rain, freezing rain, sleet, or snow. Winds or gusts over 20 knots (about 23 mph) may also draw a restriction. Over-dimensional vehicles must keep at least 1,000 feet between each other (no tight convoys), and all permitted vehicles must be capable of holding a minimum of 40 mph.

Several commodities get full legal exemptions, no permit needed, during daylight.

Poles, pipes, and structural objects that cannot readily be dismembered are exempt from length limits entirely during daylight. If the load is flush with or extends beyond the trailer, the vehicle is also exempt from escort requirements for that excess length.

Log trucks running as five-axle combinations with a pole trailer may carry logs extending up to 25 feet past the rear of the trailer, measured from the center of the rear tandem axle group, with no permit required, as long as at least 2 feet of ground clearance is kept under the load's rear end.

Farm equipment may operate without a width permit within a 50-mile radius of the farm, daylight only, on non-Interstate and non-controlled-access roads.

Round bales of hay move without any permit up to 12 feet wide on non-controlled roads. On controlled highways up to 10 feet wide, a free three-day permit is available.

Forestry machinery is exempt from width and height limits on non-Interstate roads, no permit required.

Auto transporters (tractor-semitrailer combinations moving motor vehicles) are legal up to 80 feet overall, with a 4-foot front and 6-foot rear overhang permitted beyond the combination and excluded from the overall length measurement. Compacted seed cotton vehicles may run up to 9 feet wide and 55 feet long on non-Interstate roads without a permit.

Sealed containers moving in international trade stay at legal dimensions but may carry more weight: five-axle combinations to 90,000 lbs gross, six-axle combinations to 95,000 lbs, as long as no single axle exceeds 20,000 lbs.

Cotton module vehicles with a valid oversize permit, staying at or under 9'10" wide, 55 feet long, and 14'6" high, are authorized for continuous 24-hour movement.

Arkansas calls its top tier Super Loads. A move qualifies when it meets any one of four thresholds: gross weight of 180,000 lbs or more, width of more than 16'6", overall combination length of 100 feet or more, or height of 15'6" or more. The width trigger is strict greater-than (the load must exceed 16'6", not merely reach it), while weight, length, and height triggers include the threshold value itself.

Super Load status carries a requirement that the move be essential to public health, welfare, safety or defense, a condition the applicant must address in the application. The department then has discretion to require engineering examinations of the route and structures, and the application must be filed far enough ahead to allow for them. No statutory lead time is published, but the examination and review process means Super Load applications should realistically be submitted weeks ahead of the target date.

On dimensions, Arkansas's hard permit caps matter separately from the Super Load tier. On Interstate highways, no overwidth permit is issued for a load wider than 18 feet, inclusive of all overhangs and appurtenances. On non-Interstate routes the general cap is 20 feet, with a 24-foot emergency limit. Front overhang is capped absolutely: no permit is issued for any vehicle with more than 20 feet of front overhang under any circumstances. These are not Super Load review thresholds, they are hard stops where no permit exists.

Heights over 17 feet add a utility coordination requirement regardless of whether the move is a Super Load. Written agreements signed by the owners of every overhead facility along the route (utilities, traffic signals, and similar) must be in hand before travel, and the owners or their representatives must either accompany the move or provide letters of awareness.

Arkansas does not codify a fixed dimensional trigger that automatically produces a mandatory state-performed route survey on general oversize loads. Instead the department has discretionary authority: for Super Loads, engineering examinations may be required at the department's determination, and the advance-application requirement exists precisely so there's time for them. Whether that examination includes bridge analysis, pavement assessment, or a physical route review is left to the department's judgment in each case.

One load type carries an explicit pre-move review:

Overweight moves on weight-restricted highways go through a Roadway Maintenance Assessment. The department collects core samples, performs Falling Weight Deflectometer testing, evaluates traffic data, calculates the route's remaining pavement life, and assesses any cost of additional maintenance the move would impose.

For general permitted loads, routing is split between the state and the carrier. The Permit Section routes vehicles by weighing traffic volume, highway dimensions, road surface type and condition, the type of transporting vehicle, the Federal Bridge Formula, and the structural integrity of bridges and other structures, and it routes on the basis of public safety even when that means a longer route. Once a route is set, the permittee is responsible for inspecting it before travel to confirm the vehicle and load can safely negotiate the path. Certain permit categories, forestry equipment and agronomic/horticultural permit holders, are specifically required to check idrivearkansas.com before moving to identify weight-restricted roads and bridges along their designated routes.

Arkansas does not set a fixed dimensional or weight threshold that automatically triggers a law-enforcement escort. The requirement is fully discretionary: the Permit Section may require one or more vehicles from an appropriate law enforcement agency to accompany any movement case by case. Treat a police escort as something the permit office can attach to any move it deems necessary, particularly Super Loads and other extraordinary moves, not a bright line crossed at a specific width or weight.

The agency providing law enforcement escort is the Arkansas Highway Police (AHP), a division of the Arkansas Department of Transportation (ARDOT). AHP is distinct from the Arkansas State Police, operating specifically within ARDOT's jurisdiction over highway operations.

Because there's no codified dimensional trigger, police escorts aren't a pre-scheduled element carriers can plan around a threshold table. The need for an AHP escort, and its timing, is determined during the permitting review. For Super Loads and other complex moves, expect the question to come up during permit issuance and plan accordingly.

Civilian escort vehicles handle the codified escort requirements throughout the oversize range. On two-lane, non-divided highways, a load between 12 and 14 feet wide requires one front escort; over 14 feet wide, two escorts (one front, one rear). On controlled-access or divided highways with four or more lanes, no escort is required up to 14 feet wide, and a single rear escort above 14 feet. Height over 15 feet triggers a front escort carrying a clearance bar that extends 6 inches above the permitted height of the load. For length, any combination of 100 feet or more requires one rear escort on divided or controlled-access highways, or one front escort on two-lane roads; on two-lane roads, combinations over 115 feet require both front and rear escorts. Escorts must keep 200 feet of spacing from the towing vehicle and carry two-way radio communication.